Acer laptop won't boot black screen. Laptop screen won't turn on

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Welcome to the blog! Today I’ll tell you what to do if your laptop doesn’t turn on, you see a black screen, the coolers are working and the indicators are on. It turns out that the laptop itself boots, but only the screen works. I bring mine Top 5 rating reasons for a black laptop screen based on personal experience. This top is suitable for laptops from Asus, Acer, HP, Lenovo, Toshiba, Dell, MSI, Samsung and others.

If you have an old laptop, then the backlights will fail over time. They need to be replaced with new ones of the same type or with a modern one LED backlight. Fortunately, these kits for upgrading the backlight of a laptop or monitor are now sold in abundance.

Diagnosis of such a malfunction in the service is usually carried out using laptop POST card or a known good processor or video card. At home, you can only rely on signals from the BIOS, if any.

When you have a built-in video card in the south bridge or in the processor, the fault can be determined by excessive heating. Reballing The south bridge or chip built into the motherboard used to be a common occurrence and simply a disaster for Acer, MSI and even ASUS laptops. Currently, this problem has been almost eliminated by manufacturers, with the exception of defective batches of electronics.

Reason 4 - black screen and BIOS problems

When the laptop does not turn on and it is clearly visible that the black screen is on, but the video card is working properly, there may be problems with loading BIOS commands. This often happens due to a dead battery or BIOS glitches. To start reset BIOS by shorting the Clear BIOS pins or remove the battery (often a CR2032) and short-circuit the contacts to which it was connected. Sometimes laptops are equipped with a rechargeable battery, but they also lose capacity over time. After resetting the BIOS, you may have to configure it again. Most often the default settings work.

Master Soldering tried his best for you.

In this article we will talk about such an unpleasant symptom for any laptop as. Moreover, the light bulbs may light up and the cooler will even spin. But there will be no image on the screen.

Now you will learn what to do if you find yourself in a similar situation in order to try to bring the laptop back to life on your own at home.

Why does this happen?

There may be several reasons for this laptop behavior. Starting from lost BIOS settings (UEFI) and failure of the matrix (matrix cable), to serious problems with motherboard(northern, south bridges, video card).

Now you will learn what needs to be done step by step to diagnose and correct this problem.

Resetting the laptop and turning it on without battery

The first step in such a situation is to disconnect the laptop from the network and then remove the battery.

Removing the battery from the laptop

Now, without connecting it to the network and without inserting the battery, press the power button and hold it for about 30 seconds.

Laptop power button that needs to be held

After that, connect the laptop to the network without a battery and try turning it on.

Connecting an external monitor/TV

If after the above described result there is no result, then you need to try to display the image on an external monitor or TV to check the functionality of the matrix and its cable.

VGA output in a laptop for connecting an external monitor or TV

To do this you will need any monitor or TV, as well as a cable connecting desktop computer with a monitor. It's called VGA or HDMI.

HDMI output in a laptop for connecting an external monitor or TV

After connecting your monitor or TV to your laptop, try turning it on. If an image appears on the monitor, then you have a problem with the matrix or the matrix cable.

Connecting a laptop via an external monitor

Cleaning RAM contacts

This is usually easy to do. You need to turn off the power to the laptop, disconnect the battery and turn it upside down.

Removing the cover to install memory in a laptop

There should be a cover here, usually secured with a pair of bolts. It needs to be unscrewed and opened.

Something like this should appear before you.

RAM sticks in a laptop

Small rectangular boards are RAM. They all need to be removed by moving the metal holders to the sides.

Removing RAM in a laptop

After removing, wipe the contacts with a regular eraser or alcohol, and if there are several memory sticks, try inserting them one at a time, turning on the laptop each time.

The key is on the RAM stick. You need to wipe the contacts to the right and left completely

If all else fails

In this case, it is highly likely that the north/south bridge and/or video card have failed.

To temporarily solve the problem, some heat the released element with an industrial hair dryer. In this case, it is often possible to bring the laptop back to life, although not for long.

Bridges and video card of laptop motherboard

The most the right option the required chip will be replaced with a new one, but this can only be done in a specialized workshop. The cost of such work usually ranges from $60 to $120.

The laptop does not turn on - a problem that occurs quite often. Malfunctions often occur in which the screen remains black, and it may not turn on in different ways:

Doesn’t respond at all to the start button, that is, the laptop shows no signs of life;
Startup occurs (fan spins, HDD works, the power indicator lights up), but the screen remains black. After a while the device turns off;
The computer starts up, the cooler makes noise without turning off, there is no image on the display;
The laptop does not turn on on battery. When the power supply is connected, the PC can boot.

It’s not always the case that a computer stops working on its own – someone spills coffee or tea on it, someone drops a computer device. In any case, you have to deal with the gadget.

Reasons for a black screen on a computer

If the screen shows no signs of life, there is no need to panic right away. You should first figure it out, because the reason for not being included may turn out to be trivial. Why the computer may not start:

Defective battery;
Problems with BIOS firmware;
Non-working motherboard;
South or north bridge failure;
The display matrix is faulty.

If there is no voltage in the network, and the battery is dead, then the computer, of course, will not turn on. First you need to make sure that electric outlet, to which the laptop power supply is connected, is working. The computer will not start if there is no voltage in the network and the battery is dead.

Defective battery

If the battery is low, you can simply start the laptop from the power supply, and it will charge itself within a few hours. But if the battery no longer charges, it must be replaced. Although methods for restoring a battery are described on the Internet, such a procedure makes sense only when the battery is rare and difficult to buy. And so there is no particular reason to tinker with a non-working device - depending on the laptop model, the battery costs on average from 1000 to 2600 rubles.

Check faulty unit nutrition can only be replaced by a known good block. If the laptop starts up with another device, that is 100% the reason. Repairing the power supply also does not make much sense - its price is within the same range as the cost of the battery.

The most common options are if the laptop still shows some signs of life, but the screen remains black. What can you check yourself in this option?

Connecting battery and the power supply, press the “start” button. The cooler is noisy, there is no image. There is an assumption that the screen matrix is faulty. To test your guess, you need to connect an external monitor to your laptop. Almost every mobile PC has a connector for connecting external screen yes, the standard VGA connector. If the image appears on the monitor, then it’s all in the matrix. If the external display is also black, you will have to look further for the cause of the problem.

If the screen remains black, you should turn off the laptop and disassemble it for inspection. Attribute to service center It’s never too late for a gadget, and still there is a chance to find the cause of the breakdown yourself. Disassembly should begin from the bottom cover of the case. On different models The bottom cover is removed in different ways, but the principle of removal is the same on all devices. But first of all, turn off the power and remove the battery.

We open the lid and see all the insides of the laptop (for example, ASUS K50AB).

First of all, we remove the strip with RAM and carefully inspect the strip for damage, oxides, and blackened tracks.

If there are defects on the board, it is likely that the RAM is the reason why the computer is not working. If there are external defects, you should attempt to replace the RAM. If there are no external signs, this is more difficult - most likely, you will have to look further for the cause of the breakdown.

Alternatively, you can try resetting BIOS settings. To do this, you need to remove the battery that saves the settings. Battery in in this case is removed along with the wires, the plug is attached to the motherboard.

After removing the battery, you need to short-circuit the two contacts on the board where the removed contact was attached. With the contacts closed, turn on the laptop for ten seconds.

We put everything back in place and turn on the PC again to check. If the screen is still black, the problem may already be in the north bridge or in the motherboard (video card).

The North Bridge is “treated” by heating; when heated, the surf heals the crack that has formed. The operation is almost surgical, and without experience it is better not to undertake such work. It is strongly recommended to warm up the northbridge yourself only if you have a good soldering station.

Other possible causes of a black screen

Another reason could be that the wire is broken or the power plug of the motherboard is not fully plugged in. Although such a malfunction is rare, checking the wire will not make it worse.

On a disassembled laptop, you should carry out a careful external inspection of all parts, including the motherboard. If there are burnt areas or “opened” capacitors, they may have caused the breakdown. It is unlikely that the processor has failed, but the bridges (north or south) “fly” much more often.

The video card may also fail, in which case the screen will also remain black. How can I check the video card? There is only one way out - warm up the video chip with a soldering station or hairdryer. If, after local heating of the chip, the computer starts up and an image appears, you should not be happy at all - quite the opposite. This means that the video card is not working, and it only has a month or two left to work.

It is not worth taking on the task of warming up the video processor on your own without experience and equipment; it is better to take the laptop to a service center. In the workshop they will make a diagnosis and make a “sentence” - if the integrated motherboard is faulty, you can immediately prepare to replace the entire laptop with a new one - the price of the board with work is equivalent to the cost of the PC itself.

You should know that the video card can be easily changed only on a few laptop models - it is mostly soldered into the motherboard or is generally an integral part of it. As a rule, the failure of a video chip is practically equivalent to “death” computer device– the part plus the labor is too expensive.

Black screen when booting Windows- a problem that many users face sooner or later, but not everyone knows how to fix it. What should be done? First you need to study possible reasons. There are many of them and they are different. They can be both technical and software, and sometimes the problem lies in simple inattention.

Problem with wires and/or connectors

A typical situation is problems with cables, connectors and power buttons.

Checking the power supply to the monitor

If you have desktop computer, That First check the power supply to the display. Some users get so used to working on a laptop that they don’t notice the obvious when they switch to a desktop. The power button on the monitor is simply turned off. It is no coincidence that the instructions from IBM specialists, developed for the first PCs, included checking the power supply as the very first point.
Second common cause If you suddenly get a black screen when you turn it on, the power cable is not connected properly. In practice, there were often cases when the cable plug was loosely held in the socket and was disconnected when the display was moved or the active participation of household members, including furry ones. In the office cause bad contact cables and monitors are often cleaned by cleaners who touch the wires while cleaning.

Checking the contact between the video card and the monitor

The second reason for the situation when the coolers work, but the computer does not turn on and shows a black screen, is a problem with the cable between the video card and the display. There may be two options:

The cable has come out of the socket.
The cable is not connected to the main output of the video card.

With the first case everything is clear. Just check the integrity of the cable itself and the reliability of its fastening in the connectors. But the second case is worth clarifying. Inspect back panel computer.

If there are two connectors for connecting the monitor cable, then we are dealing with one of the following situations:

In both cases, there are two options for connecting the cable. Turn off the computer, switch the wire to another connector and turn on the computer again.

Perhaps someone simply switched the cable to a different socket by mistake. Modern HDMI connector It is not equipped with screws like the old VGA, and it can be accidentally pulled out of its socket and then plugged into the wrong socket or not inserted completely.

Is the screen still black after restarting the computer? Perhaps you have technical problem(more details below).

Remember that whenever you switch the video cable, it is better to turn off the power to the computer and monitor.

"External monitor"

A laptop almost always has an output for connecting an external monitor. Therefore, if when you turn on the laptop you hear the sound of the coolers, but the screen is black, then it is likely that someone switched it to the external monitor mode. Find the external monitor control function keys on your keyboard and try turning on the internal display. Here's what they look like on an ASUS laptop:

The F7 key turns off/on the internal screen, and F8 controls the combination of output to the external/internal monitor of the laptop. They should be pressed together with function key, usually denoted Fn.

This is what the selection of operating modes with an external monitor looks like in Windows 8 and 10.

Switch different modes by successively pressing the key combination Fn and F8 for the keyboard shown above ASUS laptop. This way you can accidentally turn off the internal laptop monitor and get a black screen when you turn it on.

Software problems

Boot Loader Failure

A black screen and a cursor on it after booting a laptop or computer may indicate a failure in the operating system loader or one of the drivers. If the system startup options menu appears, try booting into safe mode. And if not, then there is only one way out - . How to make a bootable flash drive is described.

Wrong refresh rate or too high resolution

The second common problem with a black screen when loading Windows may be an incorrectly set refresh rate on the video card. The fact is that old CRT monitors work with high frequency screen updates, up to 100 Hz and higher. And modern LCDs can only support 50-60 Hz. This is due to design feature such monitors.

If you get a black screen when switching from an old monitor to a new one, then you need to do the following.

For the same reasons, you can get a black screen on a laptop connected to an external monitor. Try adjusting the frequency and resolution for the external display as shown in the picture above.

Technical difficulites

What to do if you couldn’t overcome the black screen when you turn on the computer using the methods described in this article. Perhaps the reason lies in a malfunction of parts of your PC.

If you are not a repair specialist computer equipment, then we recommend contacting the service for professional support!

The video card has failed

With such a malfunction, the laptop or PC fan works, but it does not start and we see a black screen on the screen. According to POST standard we should hear one long and two or three short beeps speaker(built-in speaker). The specified sound indication is typical for AWARD BIOS installed in many mass-produced laptops and computers.

POST is a BIOS self-test system. We recommend reading the article about.

Just be sure to make sure that the speaker is there and connected to the board. In some modern computers manufacturers do without it, replacing them with LEDs on the motherboard and even small digital indicators. But the latter can only be found in expensive motherboards for overclockers.

The monitor has failed

A malfunction of the display itself manifests itself in exactly the same way, only without sound signals. The computer does not turn on, although the coolers are working, and the screen is black. As a rule, in this case you should also see other signs of desktop activity: the drive’s LED is blinking, for example. You can check whether the display is broken by connecting it to another PC or connecting the computer itself to another display or TV. Many video cards today support HDMI, which is found on modern TVs.

Every third laptop owner is faced with the problem of a “black screen” upon startup. There may be a lot of reasons that cause the problem, but before contacting a computer repair service, we recommend that you perform diagnostics yourself. We will talk about this below.

Causes of malfunction

The reasons why the laptop screen does not work can be divided into several groups:

Damage to the south or north bridge of the motherboard due to mechanical interference or overheating of the device.
Malfunctions with central processor or video card.
Broken cable, laptop matrix or backlight.
The RAM malfunctioned or fell out of the connector.
Malfunctions in the computer hardware settings.
The battery has stopped working.

In the first three cases, repair or replacement of parts is necessary. You can try to fix the malfunctions described in the remaining paragraphs yourself.

Advice! If the laptop turns off after a long time of operation and shows no signs of life, it is likely that it has overheated. Check that nothing is blocking the air outlet, clean it from dust, and then turn it on.

Important! Determine whether the laptop starts when you turn on the power button (you can hear the noise of the coolers, hard drive whether the LED indicator lights up). Your further actions.

If the laptop shows signs of life when turned on:

Have you encountered a similar situation on your personal computer? Read this article. The laptop “comes to life” upon startup and there is a screen at hand personal computer or TV with HDMI output- check the operation of the laptop, perhaps the fault is really in the laptop:

Laptop users facing the black screen problem were helped by resetting the BIOS settings to default. If the computer shows signs of life (the coolers are working), connect it to a monitor or do the procedure blindly:

Turn on your device.
After turning on, press the F10 key (enter BIOS) for 10 seconds.
A menu will open, wait and press F9.
Press Enter (roll back to initial settings).
Press F10 (exit BIOS)/
Press Enter to save your changes, exit, and restart your computer.

Important! If the previous methods were unsuccessful or your device shows no signs of life, try another option below.

Checking RAM sticks

There is a possibility that the motherboard has stopped recognizing the RAM:

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Laptop won't turn on black screen - why, how long, what to do

mechanical damage;
overheating of the device;

Resetting hardware settings

turn on the laptop;
press the Enter button.

Checking the screen's health

the hard drive started working;
cooler noise is heard;
the indicators came on.

Reset BIOS

Reinstallation of the OP module

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Why is the screen on my laptop black and it won’t turn on?

Almost every second Windows user faces a problem when the laptop does not turn on and at the same time they only have to see a black screen. We can say that this is almost the most common breakdown.

However, everything may not be so serious and there may be no need to run to a service center for help. First of all, you need to understand the causes of the malfunction yourself. Perhaps you can fix the problem yourself, without turning to specialists.