What to do if the laptop stops turning on. When I turn on the laptop the screen is black

Youtube

One fine morning (day, evening) you sat down at your laptop, pressed the power button and the laptop did not turn on? Don't be alarmed, we'll look at this problem now. Any computer malfunction, be it hardware problems or software failures, can be identified using the “from simple to complex” method. This is what we will do in the article.

You are required to follow all the steps and methods that are described here. While reading the article, follow the steps that you can do yourself without disassembling the laptop, and only then do the more difficult options that are described in this article. The reasons for a breakdown of this nature can be different: the power supply is broken, there is a problem with the cables, unstable work video cards, hardware problems, burned out motherboard and more. Let's imagine the most neglected option - the laptop does not react in any way to an attempt to turn it on, does not blink its lights and does not make sounds. There can be many reasons for this behavior, let's start by considering those that lie on the surface, after which we will go deeper with each step in search of the problem.

Note: if the indicators on the laptop light up or noise is heard, then we will talk about this breakdown below.

Important! If you still have a warranty on your laptop, now is the time to take advantage of it! Read the article to the end and if you cannot turn on the laptop, then you should not disassemble it, since the service center will tell you what the problem is for free and will decide whether they will do it for free or you will have to pay extra.

Electricity test

So, if your device does not turn on and you are wondering why the laptop does not turn on? Then the first thing you need to do is check if it is receiving enough power to turn on. Just as a car won’t start on a dead battery, a laptop won’t start if it doesn’t receive enough voltage. And the first thing to start with is to check if there is voltage in the outlet to which the laptop is connected. This can be done with a tester, if you have basic knowledge of working with electricity, or simply by plugging any other device into an outlet, or even a table lamp or any other object by which you can understand that there is electricity.

Attention! If you use a tee or whatever it's nice to call surge protector, then that could be the problem. Sometimes, when there is a shock in the tee, the operation may be disrupted and therefore your laptop will not turn on. It is best if you plug the laptop into a power outlet without any adapters to check the functionality of the laptop.

Broken or torn cable

Having made sure that the socket is working, we move on to the “sickest” one. There are devices in the power supply of a mobile computer that are very easy to diagnose: the power supply and the battery. First, let's inspect the block visually. It often happens that our pets simply decided to “play” with the wire in the absence of the owner and damaged it. Or maybe the pets have nothing to do with it, and the wire has become unusable from regular careless handling. You need to inspect the power cord from end to end because it can break in different places. You may have a different power supply, we review the most popular ones in this moment.

Here is the power supply (areas where you need to pay attention are marked in red):

If during inspection you find obvious damage to the wire (if you have a warranty on your laptop, then in any case this repair will be paid for), you can proceed in two different ways:

The functionality of the cable can be restored with a little effort. To do this, you will need to strip the wire at the point of damage and re-solder it to eliminate the possibility of breakage. After this, it is necessary to isolate the place of soldering (one wire from another, and then the general “structure”). The easiest way to do this is with electrical tape. This method is practically free, but it will require a certain set of tools, which includes: a utility knife, electrical tape, solder, a soldering iron, as well as skills in working with the latter.
Replace the unit wire with a new one or entrust the repair to a professional. It will definitely be more expensive than doing it yourself, but it is definitely more reliable if you are not an expert in these matters.

It is possible that you will not see breaks on the cable, but you must also take into account the fact internal failure in the cable. This means that if you do not see the breakdown visually, then there is a chance that it is hidden from your eyes. In case you decide to solder the wire yourself, I can suggest watching a video that talks about repairing a laptop power supply:

By the way, they sell them at the bazaars various block power supplies for laptops, which are cheaper than in computer stores and users buy these devices due to savings. But I want to warn you a little. If the power supply is of homemade origin (and usually these are the ones sold at bazaars), then in the future this power supply must be handled very carefully, because the cables may be thin or made of poor materials. Therefore, if you buy such a power supply, then replacing it, as you understand, is just around the corner. If you buy a power supply, then you should know that it is better to overpay a little for the device and buy it at a computer store.

Additional test of power supply and laptop

Suppose visual inspection passed without results and the wire is intact. Now we disconnect the power supply from the network and from the laptop and try to turn on the laptop. In this case, the power will come from the battery, which should be in the laptop at this moment. If everything works, the problem is in the power supply itself. It could fail and not provide the voltage necessary to operate the laptop. The solution to the problem is simple - you need to replace the power supply. Also, there is no need to clarify one nuance - perhaps the battery has already run out and the laptop will not turn on because of this. To do the next test of the power supply, you need to charge your battery, for example, from another working laptop and then connect the charged battery to your laptop, but the power supply must be disconnected from the laptop. Yes, and when you charge your battery in another laptop, then after charging, disconnect the power supply in the other laptop and leave your battery. If the laptop works, it means the battery is in working order and the question of its breakdown is closed for you.

Important: if used for work universal block power supply (you may have already changed the power supply) with a voltage switch, make sure that the regulator is set to the correct voltage (usually a laptop requires 19 V, but for example, in your case it can work at 15 V, it is better to read the documentation that comes with your laptop or call the service center to clarify this data). This is very important point and skip this check with your problem it would be stupid. If you have a universal power supply that does not fit your laptop, then you need to replace it with an original one, or find a universal one that will fit your laptop.

Note: very often the sockets in laptops break - where the power supply is connected. Therefore, check your nest for damage; you can move it a little to make sure that it is securely fastened. If you think that the socket is broken, then you will have to solder or change the socket. On some laptops this procedure problematic, but at the service center I can do this operation for little money.

In addition, power supplies are often equipped with an indicator (diode) that lights up during operation. If this LED on the power supply does not light up, then the power supply is most likely faulty. During your diagnostic process, also pay attention to the indicator on the laptop itself (this indicator may not be on your laptop). The fact that the laptop “sees” your power supply can be indicated by this indicator (at the power connector or on the front side) or by the backlight of the power button.

Let's say the power supply turns out to be working. In this case, you need to check the battery: turn off the power supply and remove the battery (you need to turn the laptop over and you will see the latches that hold the battery in the case).

After the battery is removed, reconnect the power supply to the laptop and press the power button. If our laptop “comes to life”, we rejoice at the solution found and buy new battery to replace the one that failed.

What does the battery look like:

If the mobile PC is still standing lifelessly on the table, not reacting in any way to pressing the power button after the manipulations have been performed, you should pay attention to the button itself. It happens that during operation the button fails - contact is lost or the latches break. In this case, it is impossible to do without interfering with the internal world of the laptop.

Important: if you are not confident in your ability to disassemble a laptop, it is better to entrust it to professionals - repairing the power button will clearly cost less than a new laptop if it fails.

However, for inquiring minds, I will describe the process for eliminating a possible malfunction:

Filming top cover laptop and get to the button cable, after which we carefully disconnect it.
We check the contacts of the cable and button for cleanliness and integrity. They may be the culprit of your breakdown. If the culprit is the cable, then replace it with a new one.
You can try to repair the cable. Cut a piece of the train down to where it is in good condition.
To clean the cable insulation, it is better to use a blade or a very sharp knife.
Place tape on the other side of the cable (where there are no contacts). Thus, the thickness of the cable will increase and it will be securely clamped in the slot (where the cable is connected).
Now you must insert the cable into the desired slot (from where it was removed) and check its functionality.

Again, we hope for the best, but if repairing the button doesn’t help, don’t despair, there are still plenty of options for getting the laptop started working.

Connected devices prevent the laptop from turning on

Again, we return to methods that do not require disassembling the laptop. Inspect all mobile PC ports for connected devices. It may happen that one of the connected devices prevents our laptop from starting. To test this option, disconnect all connected devices and try turning on your laptop. You need to turn off absolutely everything - flash drives, mouse, etc. USB devices, which are currently connected to the laptop. In your case, only the power supply should be connected and that’s it!

If he “sang”, we rejoice, but we continue to identify the “pest”, connecting the devices back one by one. As soon as the laptop refuses to work, you can classify the last connected device as “enemies of the people” and limit your laptop’s “communication” with it.

The laptop makes sounds, the cooler is running and the laptop has a black screen

If, when you start the laptop, you hear the characteristic sounds of its operation, but do not see the usual picture on the screen, the problem may be hidden in the display or video card. To exclude the first option, you need to connect a regular monitor from a computer to the VGA or HDMI port of a laptop with a known working monitor.

We are trying to turn on a laptop with a monitor connected to it. If the usual pictures appear on the monitor, congratulations, the problem has been found, it lies in the laptop display (or in the cable with which it is connected). If, when you turn on the laptop, a third-party monitor also shows a black screen, just like the laptop’s native screen, it’s probably a problem with the video card.

A laptop video card, like any other component, can fail for many reasons. It needs repair or replacement - competent specialists will decide; it is unlikely that you will be able to fix the problem yourself. It is recommended to send the laptop for service and wait for a professional opinion. However, before visiting the service, you can use one trick, which I will discuss later.

Discrete video card does not work

Most laptops now have such powerful filling, which, without straining, cope with heavy applications, often with complex graphics. Therefore, mobile computers are equipped with discrete (separate) video cards. At the same time, there is also a built-in video card on board, which acts as the main “workforce” in less “rich” assemblies. So, if, in your opinion, a discrete video card has died, it’s not difficult to check. You need to get to the insides of your mobile PC and disable the video card, then see how the laptop behaves.

The specific location and procedure for disabling a discrete video card depends on the laptop model, and in order to do everything correctly, you will have to turn to a search for a query like “how to disable a laptop’s video card ", where instead You need to enter the brand and model of your mobile PC. For such a request, you can easily find not only step-by-step instruction, but also a video, and you will cope with the task without any problems.

RAM has failed

A mobile PC consists of many electronic components, each of which can suddenly fail, and the laptop simply will not turn on. Here’s what’s worth checking during the diagnostic process if you’ve already decided not to send your PC to service yet and climbed inside your faithful “friend.”

First of all, you need to make sure that the memory modules are working correctly. Depending on the laptop model, dies random access memory placed differently. Usually there are inscriptions at the bottom of the laptop, which can be used to understand in which area this or that component of the laptop is located.

As you can see, the arrow shows that you need to open the bolt:

After the bolt is unscrewed, you need to pull this part of the part towards you (in the picture above we see another arrow that shows in which direction the opening occurs):

In the picture I showed the latches that hold the RAM; you need to remove the dies using these latches:

They are diagnosed as follows: find the RAM among the insides of the laptop. If there are several dies, this simplifies the check; you just need to disconnect the RAM modules one at a time and try to turn on the laptop each time. Naturally, if the laptop “starts up” after disconnecting one of the dies, it is probably the one that is faulty and requires replacement.

If there is only one memory module, then to check its functionality you will need a spare module (you can search among your friends). We install another, obviously working, memory stick in place of yours and try to turn on the laptop. It worked - great, the problem was found. No, we continue our search.

By the way, do not forget to visually inspect the contacts when disconnecting certain devices in the bowels of the laptop. They should all be clean and undamaged, and fit tightly in place. The presence of oxides on the contacts is not allowed; this may cause the laptop to not work. If during the inspection you find an oxidized contact, clean it until normal condition and only after that return the module to its place. When you remove the RAM, I recommend cleaning the contacts on the RAM using a regular pencil eraser, but not for pens! Perhaps the contact was weak and the laptop was malfunctioning. You can also blow out the RAM slots with a hairdryer or vacuum cleaner to remove fine dust.

Processor and its weaknesses

I’ll mention one more detail, the “heart” of our laptop – the processor. The laptop may refuse to turn on if there are any problems with the processor. And the first procedure with it, which anyone will tell you about computer wizard- replacing thermal paste.

The processor is perhaps the main organ of any computer, its “brain”. Different laptops use a great variety of processors, but one feature remains the same: any processor needs high-quality cooling. That is why it is usually installed in close proximity to the radiator, so that it can remove the heat produced by the processor and dissipate it, thus cooling the “brain” of the laptop. And in order to achieve maximum heat transfer from the processor to the heatsink, a layer of thermal paste is applied between them - a substance with low heat capacity and high heat transfer rate. Over time, the quality characteristics of thermal paste decrease and it must be replaced with fresh one. Thermal paste can be purchased at any computer store or service center. And the most important thing is the price, it costs from 5-10 rubles, which is enough for 1 time.

IMPORTANT: the processor is a very fragile part that requires careful handling, so replacing thermal paste must be done carefully. Be careful and remember that our goal is to figure out why the laptop refused to work, and not to plunge it into an even deeper “coma” with our actions.

You should also read that thermal paste is applied to different places on the motherboard. When you take your laptop apart, you will see 1-3 objects that need thermal paste.

The laptop turns on, but the operating system does not load

This is the story: we press the power button on the laptop, it makes characteristic sounds, some lines run on the display, but in the end the loading stops, trying to tell us something on the English language(or reboots endlessly). There could be a lot of possibilities as to why the download does not continue as usual. Let's look at the most common of them:

The laptop was shut down incorrectly. Because of this, a failure occurred, and loading instead of the usual operating system gives an error message. The first thing to try is to restart your laptop. Most likely, it will not respond to any keyboard buttons, so we simply hold down the power button for a few seconds until the laptop turns off, and then turn it on again. If the problem repeats, we carry out slightly more complex manipulations: turn off the laptop and remove the battery for ten minutes. While waiting, press the power button 3 times.

Disconnecting the power will allow the laptop to get rid of “negative memories”, and after that it can turn on as if nothing had happened. This method really saves, and I recommend everyone to do this option.

An error has crept intoBIOS(system software, like an operating system at the very heart of a computer). It could, for example, be set to boot from incorrect source, boot parameters have been changed. If you are not good at BIOS menu, try to simply reset it to factory settings. For ordinary users The question “comes up”: how to enter this BIOS? In fact, the procedure for entering the BIOS is simple and does not require fancy capabilities from you. By the way, on the site I already talked about how to enter the BIOS and how to set boot priorities in order to install Windows. Link to article. You don’t need to read the entire article (unless, of course, you want to try reinstalling Windows yourself, I recommend reading it), just read the section where I talk about logging in. In short, when you press the laptop's power button, you need to press one of the keys (each manufacturer has its own key): Delete, Esc, F1, F11 or F12.

Menu in different BIOS versions different, so find the item with the word “defaults”, select it, and then confirm your choice by pressing the “Enter” button. A message will appear asking you “Should I download or not?” Of course you agree, press the “Y” key (“Yes”). The computer will reboot and try to start again.

Here is an example of what your BIOS might look like (you need to go to the “Exit” menu):

Or like this:

Some operating system files are damaged. There are plenty of options for solving this. For example, you can use standard means recovery. If a failure is detected in the OS, the system itself will offer you to restore the last successful configuration (perhaps the system crash was caused by installing software from an unreliable manufacturer). You can also try to run from the so-called LiveCD/LiveFlash. This is a disk/flash drive, respectively, formed in a special way and equipped with everything necessary to boot a PC: system recovery and error correction. Everyone has such a LiveCD in their arsenal. system administrator and a computer service technician. You can also try another method: press the power button on the laptop and immediately press F8, you will see a menu where you select the “Last good configuration» - available in different Windows versions, but some people enter differently. I told you an example for Windows. And finally, you can reinstall the OS if you are sure that the problem is damaged files, but it is not possible to restore the previous working OS.
The OS boot disk is faulty. Hard disks sometimes they fail, and perhaps this moment has come right now. When the laptop boots, the BIOS sends a request to load the operating system to the hard drive, but it is silent. As a result, the OS does not load, and we see an error message or an endless reboot. Unlike the previous point, in this case reinstalling the OS may not help, it will simply be impossible to do. Only replacement will save you in this situation. hard drive, since in most cases they cannot be repaired. To make sure that the problem is with the HDD, you can also start with bootable flash drive or disk and check performance of hard disk. Most likely, it simply will not be detected by the scanning tools, or you will see a message about incorrect operation. The solution is to replace the hard drive. The site has a very detailed article on how to check any HDD: « ».

In addition to the reasons listed above, there are others. When turned on, the laptop may stop loading or constantly go into reboot (reboot) due to a malfunction of the microcircuits or inconsistent contact of one of them. This is unpleasant, but not surprising - mobile computer often lives in extreme conditions, and is not only subject to vibrations and other physical influences, but it simply accumulates so much dust that at one point it may simply prevent it from starting, damaging something inside. This is why regular cleaning of the insides of the laptop from accumulated dust is so important. Dust accumulates inside, inhibits air circulation, disrupts cooling, and jeopardizes everything electronic components PC.

Cleaning your laptop is easy. To do this, you need to open the lid and, armed with a vacuum cleaner or a large brush, or better yet, both, methodically clean out dust and dirt from the inside of the laptop. The main thing is to approach this issue with extreme caution so as not to damage the laptop components during the cleaning process. And remember: laptop cleaning should be included in the list of regular preventative maintenance and carried out at least once a year if you want your laptop to serve you for a long time.

If even after cleaning the boot situation has not changed, feel free to send the laptop to a service center to identify the problem. If the article was useful to you or you found your problem, you can leave a comment that will allow other users to pay attention to this when testing their laptop.

An incomprehensible situation when, when you press the power button, the laptop does not show any signs of life, makes the user seriously nervous. The laptop is often used for work, so one involuntarily becomes afraid for the fate of the documents stored on it.

Fortunately, these fears are not always justified: in most cases, any malfunction laptop computer, whether there is a problem hardware or failures in the software can be fixed without causing damage to the data. Moreover, diagnose and eliminate this malfunction you can do it yourself.

As practice shows, the reasons why power button stops starting laptop, maybe several. All of them can be divided into two groups - hardware (problems with hardware) and software. Let's look at the most common of them:

PC power failures- the most common problem hardware nature. It is possible that the laptop battery is completely discharged, and to fix the problem, just put the laptop on charge and wait a little.

When connecting the power supply, you should pay attention to whether the power indicator, which is usually located on the front of the laptop case, lights up. If the light does not light, then the reason should be sought in the adapter and power cords.
In this case, you need to check the reliability of the connections of all connectors and make sure that the outlet itself is working. To do this, just connect any other working electrical appliance to it. Next, you should inspect the power cord for damage.
If the laptop's power button is blinking, this indicates problems in the power circuit. There is a possibility that there is a problem with indoor unit power supply on the motherboard. IN in this case You can’t do it without the help of a specialist.
Battery problems. If the power light is on, but the laptop does not respond to the power button, you should check the battery. To do this, you need to remove the battery, pause for a few minutes and try to start the computer without it. If the problem was in the battery, the laptop will turn on, but will only work from the mains. In this case, all that remains is to purchase a new battery.

Lack of initialization is the main reason of a programmatic nature.

In this case, when you click on the “Start” button, the laptop starts, but does not fully boot. There may be several reasons for this behavior.

The most common are damage to the BIOS firmware, overheating of the processor (for example, due to a cooler clogged with dust), loading from hard drive, etc.

Some missing initialization problems can be resolved on your own.

First, you should disconnect the hard drive and check whether the BIOS splash screen appears when you turn on the laptop. If it appears, it means the hard drive requires repair or replacement.
You should also check whether the RAM is tightly seated in the connector (it often comes off due to shock or vibration).

The power button does not work.

The start button of the laptop itself may also fail during operation. There may be several reasons for this - from simple wear and tear and contamination to moisture getting on the conductive paths (for example, when turning on the computer with wet hands).
To fix the problem in this case, you should check the functionality of the button and, if necessary, clean or replace it.

How to check the laptop power button for malfunction

To make sure it's really The power button on the laptop does not work, it is necessary to diagnose it.

To do this, you should perform a number of actions:

Disconnect the device from the network;
We disassemble the laptop. To do this, turn it over and remove it battery, unscrew all the screws on the case, disconnect the bottom cover;
We carry out a visual inspection of the button. In most cases, the button is very simple: two contacts close when you press a convex metal diaphragm. Very often dust accumulates underneath it, and the contacts themselves become covered with a layer of oxide over time. As a result, when you press the button, the contacts do not close;
We call the button. To do this, place the needle tips of the tester on two contacts of the button and press it. When you press the button, the device should emit a characteristic sound signal. If this does not happen, the button does not work;
We clean the contacts under the metal diaphragm of the button. Carefully remove with tweezers top part buttons and using a contact cleaner, remove traces of oxide and other contaminants;
We assemble the button and perform repeated testing. In most cases, cleaning the contacts allows you to restore the functionality of the button without replacing it.

VIDEO INSTRUCTION

If such manipulations do not produce results, and the button still does not work during testing, its complete replacement is required. To do this, the old part is desoldered and a new one is mounted in its place.

How to turn on a laptop without a power button

There are several ways to turn on a laptop without a button.

If the computer is disassembled, you can start it by closing the contacts Power buttons screwdriver

However this method It is appropriate only if you need to make sure that the button itself does not work, and that, say, the cable of the laptop power button is not broken.

When you urgently need to start a laptop for work, it’s easier to use another method:

We start the computer by pressing and holding the Del key;
In the BIOSa window, go to the Power Management Setup section, which is responsible for the computer’s power consumption settings;
Select the Power on Function option, which determines the order in which the computer is turned on;
To turn on the computer from any key on the keyboard, select “Any Key” in the settings;
Save the specified parameters (F10), press ENTER.

If you press the power button and the laptop does not boot, then this can be called an unpleasant moment. Situations in this case can be different: the laptop does not boot (black screen and the startup process does not occur at all), the laptop turns on but does not boot, or it boots, but the screen is black, and what to do in such cases can only be decided by experienced specialist. First, let's try to figure it out a little on our own. Firstly, the laptop may not turn on at all, to understand this, just listen and look to see if the power indicators light up. Secondly, the device may show “signs of life”, that is, the indicators will light up, the noise of the fan will be heard, but the screen will still remain black. There may be many reasons why a laptop behaves this way, but there is no need to panic right away, since it won’t take much time to solve them at the Serty Service computer repair center and, as a rule, the repairs or maintenance required when such a problem occurs is relatively inexpensive. Question: “The laptop won’t boot, what should I do?” - no longer a problem!

Reasons why you may be seeing a black screen on your laptop

Basically, if a laptop does not turn on or its screen does not light up, the reasons lie in its hardware and require diagnostics at a service center. However, if the laptop does not react at all to pressing the power button, you can try removing and inserting the battery, try turning on the laptop without a battery using only the power supply. You should also pay attention to whether the battery charging indicator lights up when the power supply is connected; perhaps it is the one that has failed, and the battery is completely discharged.

The most common problems that require repair under service conditions and lead to the screen not lighting up include:

For relatively old laptops with a gas-discharge backlight lamp, both the lamp itself and the inverter powering it may fail;
Failed internal power controller;
Failure of the cables supplying power to the lamp or LED matrix;
BIOS firmware failure;
Problems with other laptop components that can be called more serious and expensive to repair, for example, failure of RAM or video card.

You will also not be able to start the laptop normally if it is infected with viruses or the operating system crashes, but in this case you should still see the BIOS loading process on the screen, and the problem is most likely of a software nature. You can check this, for example, by trying to boot your laptop from a flash drive or optical disk, on which it is recorded special version a system designed to test a computer and gain access to the disk when the main system does not boot.

How to solve the problem of a black screen on a laptop

If you cannot turn on your laptop at all, and you have tried removing the battery, turning it on from the power supply, and also checking the integrity of the cords and contacts, there is only one solution to the problem - take the device to a service center.

If the laptop simply does not boot and a black screen appears even as the system boots, you can try checking it for viruses by booting from a special disk or try reinstalling the system. However, if you do not have experience in performing such restoration work, it will be easier and faster to solve the problem by contacting qualified Serty Service specialists.

Has your laptop stopped turning on after being used for less than a year? Or didn't work at all? Then this article will be useful to you. It describes what you can do independent actions in such an unpleasant situation, and when you need to turn to professionals and get qualified help.
There are two types of problems with a laptop: software and hardware. Software failures are resolved on the spot. These include operating system problems, failures in BIOS settings, etc. Hardware problems are those when manual repair is required, that is, physical intervention in the device.
First you need to identify your problem. If the laptop stops turning on, we can say with confidence that the problem is hardware. And if it turns on, but having reached Windows boot freezes, reboots, then some software or hardware problems are possible. The rest of the article will describe step-by-step diagnostics of existing problems, and you can rule out problems that do not apply to your case. Having diagnosed the fault as accurately as possible, you will have already completed half the repair.

Laptop won't start

Mostly such problems are related to nutrition. It is necessary, first of all, to check the voltage in the outlet by connecting the power supply to the laptop. Power adapters usually have a light on them that confirms their functionality. On a laptop, such a light indicates that the battery is charging or is connected to the network.

Most often, the power supply is broken or does not work properly (in this case, you need to try a similar one that works), the wires are deformed, the contacts in the connectors are worn out. Having assessed all possible breakdowns, we can conclude when exactly the power goes out.

To avoid problems with the power connector, you need to insert the plug into the laptop first, and then the power cord into the outlet. Thus, at the moment of connecting the plug, it is possible to exclude a short-term spark.

If all the indicators are on, but the laptop does not turn on, then most likely there is nothing to do with the power supply. You should try removing the battery and then plugging the laptop into the network, but without it. Then after 10 minutes return the battery to its place. By turning off external devices, constantly try to turn on the laptop, if it works, then return the devices one by one to their place. This way you can determine the cause of the problem.
If guarantee period your laptop has not yet run out of power, but it does not turn on, you need to contact the nearest warranty service center as soon as possible.
This is, perhaps, all that you can do yourself without disassembling the laptop if it does not turn on at all. More serious reasons for this failure may be: a failed or burned out motherboard, a broken power controller, a BIOS firmware failure, a broken contact inside the device, and others.

The screen does not show or does not work, but the noise of the laptop fans is heard

The laptop itself may turn on, but the monitor does not work. Take a good look at it, the backlight may not be working properly. Find and press the hot keys to turn it on. On most Lenovo models, for example, the keyboard shortcut " Fn+F2».
The surest way to check the screen is to connect external monitor to the VGA output of the laptop. If the image appears, that means for sure.

For amateurs computer games Often the discrete video card fails. It overheats, which quickly breaks down. The main causes of failure are: poor cooling system, misuse, dust and pollution.

When using a laptop, do not close the ventilation openings (do not place it on your stomach, on a soft sofa, on your lap, etc.). Cooling pads must be used. If the laptop is not designated by the manufacturer as a gaming laptop, then it is not recommended to play games on it for a long time that require large resources. Don't forget to monitor the temperature of your video card.

So, if the problem is with the video card, then turn it off using the switch that is found on some models and take it out. A laptop without a video card can work, you just won’t be able to play games with high demands.

More serious reasons are also possible: the problem is a burnt-out motherboard, not working condition memory or processor, broken BIOS firmware and etc.

Turns on, then shows a splash screen, maybe writes something, and then hangs

The initial screen saver or information about the laptop may appear, and then absolutely nothing happens. A beep is heard or an error message is displayed on the monitor. The cause of the failure is most likely in the BIOS settings. You just need to log in and reset all settings to default.
IN different versions This point is located in different places, but has approximately the same name " Load BIOS Defaults", Where " defaults» keyword. Then exit after saving all settings (“ Save Settings and Exit»).
If the system reports an error and further loading is possible, then you just need to click on the button required in the message. For example, it might be written “ Press F1 to continue"(press F1 to continue loading). This usually happens if the battery on the motherboard runs out (not to be confused with a shared battery), and the time settings and Bios settings fail. Such a breakdown must be repaired at a service center.

Fixing such breakdowns is the only thing you can do yourself, since the problems can turn out to be much more serious. For example, a failure in work hard disk or RAM failure.
Having some experience, diagnose problems directly with hard drive perhaps by listening to the laptop. When turned on, the working disk spins the engine, reads the information for a few seconds, and crackles. If problems arise, the engine may try to start several times without success, or a cyclic crackling sound can be heard from the heads as they attempt to read information from the platters, and the image freezes on the monitor.
Some models have direct access to RAM. If you suspect that the problem is with them, you can try to remove them and carefully clean the contacts. If this procedure does not bring the expected result, then try rearranging the memory modules into another slot. And if there are several of them, then leaving one strip at a time, try to start the laptop.

Laptop reboots and turns off

Even before trying to boot Windows, the laptop can reboot endlessly. This is a serious hardware problem, one of possible reasons is overheating of the south bridge and its short circuit. This happens mainly due to USB breakdown(you need to remember what was inserted into such connectors).
Another reason for turning off or restarting a laptop is CPU overheating. This usually happens if the cooler is clogged with dust or the radiator does not fit tightly. But this phenomenon is mainly accompanied by high fan speeds and occurs very rarely. In this case, it is possible to restart the laptop and turn it off at any time.
If the power supply is insufficient, or possibly completely absent, the device may quickly go out when turned on due to a dead battery.

A message appears on the monitor - startup from boot device is not possible

Various messages may appear, for example, “Error loading operating system"or similar. First of all, remove the disk from the drive and remove all flash drives from the connectors, then reboot the machine. If this procedure is unsuccessful, then the problem is with the hard drive (hardware or software problem).
A service center can help you solve a hardware problem, but first you need to make sure that the problem is in the disk. The easiest and easiest way is to reinstall Windows yourself. If it helps, then the problem is software.

Windows starts and loads, but everything is quite bad...

Windows starts loading as usual, but then the laptop randomly reboots and errors appear on a blue or black screen. In such a situation, there may again be a hardware problem, various network failures.
The easiest and most reliable way to check is to reinstall Windows. A simplified version of checking is to try to start with a bootable USB flash drive or disk with Windows. If the laptop also behaves poorly, then it is probably necessary to take it in for repair.

Let's sum it up

What should you do if suddenly the laptop does not turn on? Initially, think about it and try to remember what happened before and how it was used. If you played on it for a long time, then most likely the video card and other parts on the motherboard overheated. Then you need the help of an experienced specialist.
If you tried to install any programs on your laptop, rebooted it and the operating system did not load, then there may be errors with Windows.
The main and main diagnostic problems and their independent decision are described in this article. Finally, I would advise you not to disassemble your laptop without having the necessary experience and not to immediately make rash conclusions.

But good news The fact is that most of the problems that arise in the operation of this device can be solved. You just need to determine the cause of the breakdown and its nature, and then act according to the situation. All problems with a laptop are either software or hardware. It is necessary to accurately diagnose the malfunction, and then you will already know exactly what steps to take to eliminate it.

So, why doesn’t the laptop turn on and what to do?

The worst thing that an ordinary user of this device can imagine is. What to do in this case?

Often, if a laptop does not start, the problem lies in its power supply. Therefore, first of all, check whether there is light in the house and voltage in the outlet.
If there are no problems with electricity, you should proceed to inspect the power supply. Perhaps it began to work intermittently or broke down completely. The surest way to make sure of this is to get exactly the same power supply, only in working condition. Connect it to your laptop and see if your device turns on.
Often the breakdown of the power supply is of a very trivial nature - broken wires or broken contacts in the connectors. By the way, in the future to avoid problems with charger One simple rule will help. When charging a laptop, first plug the plug into the device, and only then plug the adapter cord into an electrical outlet. The fact is that if the connection order is different, a spark appears, which damages the contacts.
If a similar power unit does not save the situation, then it is time to move on to more decisive action. Remove the battery from your device, wait 10-15 minutes, and then turn on the device. If it turns on without problems, then ensure it and put the battery in its original place.
Another reason why the laptop does not turn on is sometimes due to the . Disable them all, including even . Try starting the device again. If the laptop turns on, then return the external devices one at a time to understand which one caused the problem.

These are the steps you can take on your own when your laptop won't boot. If none of them led to the desired results, then the problem should be sought in non-working, broken internal contacts and more. And only an experienced master will help with this.

You can hear the coolers operating, but the laptop screen does not work

So, you know what to do if your laptop won't turn on. But there are also cases when it starts, but its screen remains dark. What to do in this case?

1. Look closely at the monitor. Perhaps something can still be seen? If so, then the screen is most likely fine, but the backlight does not work. You can enable it using hot keys on your keyboard. Each model has its own and is well known to most users.
2. Another way to check the screen’s functionality is to connect an external one to the laptop. If a picture appears on it, then there is no doubt and the cause of the malfunction is determined.
3. Often the problem is hidden in the discrete video card. This element sometimes overheats and breaks. By the way, some video cards are prone to breakdowns more often than others. For example, nVidia video cards have a short service life.

To prevent such damage, do not hold the laptop on your lap or in other positions where its ventilation openings are blocked. In such cases, it is advisable to use special stands that do not interfere with air circulation.

If your laptop is not a gaming laptop, then do not devote too much time to playing games on it. And one more thing - do not forget to monitor the temperature of the video card. If this is the reason, then remove it or simply turn it off - some laptop models have switches specifically for this. With a missing discrete video card, your device will continue to function, you’ll just have to say goodbye to some games temporarily.

Of course, the reason why the laptop boots and does not turn on may be more serious. For example, in some cases the problem lies in the processor or firmware, motherboard or. But you are unlikely to cope with such difficulties on your own.

Turns on and freezes after splash screen

Sometimes, for some reason, the laptop won’t start. And sometimes it still starts, you can see on the screen opening screensaver and basic information about the device, and then the device freezes. Either absolutely nothing happens, or information appears about errors that interfere with the full operation of the machine.

Don't be afraid. Most often, the reason for this is the BIOS settings. You just need to enter the BIOS and reset all parameters - “Load BIOS Defaults”. After that, save and exit.
Sometimes it happens that the laptop freezes, reports an error and asks you to press a certain button. For example, “Press F1 to continue.” As a rule, after pressing it, it continues to turn on and continues to work in normal mode. And although this solution to the problem is the simplest, you should not ignore the very fact of reporting an error. Most often this happens if the battery on the laptop motherboard starts to run low or the BIOS settings. Please note that to replace the battery you must contact a service center.
Of course, problems with a laptop can be more serious. For example, work-related malfunctions manifest themselves in a similar way. In this case, there is a chance to determine the presence of hearing problems. If the hard drive is faulty, you will hear the engine trying unsuccessfully to start, accompanied by a slight crackling of the heads.
Another reason why the laptop does not turn on is the RAM. Some device models provide access to its strips. You can try removing them and carefully cleaning the contacts. If this does not help, then start the machine, leaving only one memory module at a time. If your device only has one stick, then put it in another slot and start the device again. There is a good chance that these actions will help solve the problem.

A message is displayed indicating that the boot device cannot start

Usually, we're talking about about various messages in English. If you encounter this, then remove everything from the device and remove the disk from the drive. Restart your laptop. If your actions did not bring any positive result, then the problem most likely lies in the operation of the hard drive. Such a malfunction can be either software or hardware in nature.

In the first case, reinstall Windows. If after this your laptop began to work as before, then this means that the problem was software and has now been resolved. If reinstallation does not save the situation, then it’s time to contact the service department, whose employees will solve this malfunction at the hardware level.

The laptop keeps rebooting or shutting down

If your device keeps shutting down and rebooting, then there is most likely a serious hardware problem. Perhaps the fault is due to a short circuit in south bridge which caused it to overheat. Or dust has clogged up, causing excessive heating inside. If so, the fan will operate at high speeds, but still will not cope with the problem. As a result, your laptop will periodically shut down and reboot. This will happen at very different moments, regardless of external reasons. This time you are unlikely to be able to solve the problem yourself, so contact the service center immediately.

But before that, make sure it's not a matter of poor nutrition. If the laptop battery is low, the device may turn on and then immediately shut down.

After booting, Windows shows the screen of death, errors on a black screen and reboots

Another fairly common problem is when Windows starts loading when you turn on the laptop, but then the loading is interrupted and the device is rebooted. The screen turns blue or black and displays numerous error messages.

As in the previous case, the problem can be either software or hardware in nature. And it will again help to understand what exactly happened to your device reboot Windows. You can reinstall the operating system from a bootable USB flash drive. If this was successful, then the problem can be considered solved. If not, then without the help of specialists from service center can't figure it out anymore.

Thus, if the laptop does not turn on, then this is not a reason to panic. In many situations, you can diagnose and solve the problem yourself. You just need to analyze your latest actions with this device. For example, if shortly before the breakdown occurred, you spent many hours playing the game, then you most likely overheated. With a little effort, you will be able to bring your device back to life again.