A number of laptop users may encounter a situation where USB ports on laptop not working, and devices connected through them are not recognized Windows system. This problem occurs quite often, and can have many reasons, making it difficult for the user to work with the USB devices he needs on his computer. In this article I will tell you why they don't work USB port s on a laptop, what are the reasons for this phenomenon and how to fix it.

So, why did the USB ports on the laptop stop working? The reasons for this dysfunction may be the following:

How to fix non-working USB ports

In order to fix non-working USB ports on a laptop, you need to do the following:

• Restart your laptop. It is recommended to turn it off completely, remove battery for a few minutes, then return it back and boot the operating system again;
• Inspect the USB connectors of your laptop, if necessary, clean them from dust using a regular wooden toothpick;
• Try connecting your device to another USB connector; perhaps the first connector is no longer functioning;
• If you are connecting your USB device via a cable, try changing the latter, this may help the problem when the USB ports on the laptop do not work;
• Make sure that the connected USB device works; to do this, connect it to another computer;
• Go to BIOS and make sure that the USB functions are enabled;

  

• Manually recognize USB devices using the system. Click on the Start button, type devmgmt.msc in the search bar and press enter. Device Manager will appear in front of you, click on the name of the list of devices at the top (usually the name of your computer), click on the “Action” tab, and select “Update hardware configuration” there. If the system finds USB controllers during this procedure, then your problem can be solved;

  

• Remove and then reinstall the USB controllers. Go back to Device Manager as described above, find “USB Controllers” there, and double-click on this entry. A list of USB controllers will open in front of you, right-click on the first one and select “Delete”.

  

• Similarly, delete all controllers in the list. Then restart your PC, these controllers will be automatically installed by the system again, this can help fix the problem when the USB ports on the PC do not work;
• Reinstall the drivers for the USB. Usually, the laptop comes with a disk with drivers, including a USB driver; you just need to install it on the computer and the problem will be solved. If your USB connection is highlighted question mark or has the status “unidentified device”, then you need to find out the ID of your device, and use this ID to search for drivers on the network;
• If you have several connected USB devices, then try turning them off and leaving only what is needed at this moment;
• Download and run a special utility from Microsoft, it can help fix problems with USB if the USB ports on the laptop are not functioning;
• Perform a system rollback to a previous working restore point (). Click Start, type rstrui in the search bar and press enter. Find a restore point at which the system worked correctly and perform a rollback;

  

• If everything doesn't work for you USB ports and the above methods didn't help, then maybe you're burned out south bridge. Its replacement (or warming up) is carried out in service center on special equipment, contact them for advice and assistance.

Video solution to a situation where the USB port does not see the device

In this material, I examined a situation in which the USB ports on a laptop do not work, listed a list of reasons for this dysfunction and provided a number of tips for solving it. If you don't know what exactly caused it mentioned problems with USB ports, then consistently follow the entire set of tips I have listed, this will help to effectively solve the problem with malfunctioning USB ports on your PC.

In contact with

Do you know?

If you put Jean-Claude Van Damme on your desktop screensaver, you can do without an antivirus.

Do you know?

Tony Stark's suit is equipped with every operating system in the universe...

Do you know?

Chuck Norris once protected Kaspersky from viruses

Do you know?

Paris Hilton turned on her first computer for 4.5 hours

Why doesn't the USB port work? Lenovo laptop?

If the USB port on your Lenovo laptop stops working, you will not be able to connect any external equipment or peripherals to it. Moreover, no matter how often you use this opportunity or whether you use it at all, you still need to contact an electronics repair center and undergo diagnostics. The thing is that problems with ports can indicate serious breakdowns that need to be urgently addressed.

Why the USB port does not work: the most common causes of the problem

Most common problem The reason why USB ports on a Lenovo laptop do not work is the failure of the south bridge motherboard. It, in turn, can break for the following reasons:

• penetration of aggressive liquids into the laptop case - coffee, beer, carbonated drinks, etc. If you accidentally spilled them on the keyboard, do not even think about using the device; it is better to turn it off immediately and call a technician. Otherwise, failure of the south bridge will not be the most worst problem;
• short circuit If you connect any faulty USB device to your laptop, it may burn out the south bridge.

Problems with the southbridge can be easily identified even without the appropriate skills and knowledge. If the USB ports on your Lenovo laptop do not work and the laptop gets very hot, you will have to repair this particular part.

Another reason for port malfunction is that they are broken or heavily soiled. To identify it, just try to connect external equipment to a different connector and check its functionality. It is better to trust the cleaning or replacement of the port to specialists who can select the right part and install it efficiently, or carefully remove dust.

Software failure: restoring the operation of USB ports by installing drivers

Another answer to the question why the USB port on a Lenovo laptop does not work leads us to the software problems listed below:

• incorrectly installed or outdated drivers controllers responsible for the operation of connectors;
• penetration of viruses that can negatively affect the operation of all systems;
• error in BIOS. It can be fixed by replacing the firmware.

Any problems that lead to USB ports being disconnected can be resolved by our service center specialists. To use the services of professionals, you just need to contact one of our representative offices in St. Petersburg, Moscow, Yekaterinburg, Nizhny Novgorod, Voronezh, Kazan or Chelyabinsk and order a free visit from a specialist.

Quite often people come to us asking why the USB ports on their laptop or computer do not work. USB ports may stop working after Windows reinstallation, after updating drivers or at any inopportune moment. Of course, the problem may be faulty USB ports, but before taking your laptop/computer to a service center, you should check the settings to make sure that the problem is not in the software.

So, let's see what you can do in a situation where the USB ports on your computer or laptop are not working.

Check USB ports

The first thing you need to do is check the USB ports for physical damage.

A simple test is this: Insert a USB device into a port on your laptop and see if the connected device moves up and down easily. Be careful! You should not yank the USB port too hard to avoid breaking it.

If the USB port moves too freely, the problem is probably physical damage. You should contact a service center to replace the USB port.

To restart a computer

You can also try the good old method of any department technical support: Turn off and on. Sometimes it really works because operating system rescans Hardware, including USB ports, making them work.

If this doesn't help and the USB ports are still not working on your computer, then it's time to check the Device Manager.

Check Device Manager

You can run device Manager several ways, but we'll tell you about the fastest one: press the Win + R keys and enter devmgmt.msc. Click "OK" or key « Enter». Device Manager should immediately appear on your computer screen.

In this window we are interested in the section “ USB controllers" Click the arrow next to this label to expand the section. You will see something like the window below:

Here you should find a device that has words USB Host Controller in its title. For example in my case it is Intel(R) 5-Series/3400 Series Chipset Family USB Enhanced Host Controller. Some letters may be different for you, but in general you should have a similar device. If it simply isn't there, that's probably the problem why the USB ports on the laptop aren't working.

In this case, you should click right click on " USB controllers» and select "Update configuration" The computer will recheck the hardware and you will see USB Host Controller in the list.

Remove USB Host Controller

Next, you need to act carefully. If you work on a computer, then most likely you have connected USB mouse and keyboard. After you remove USB Host Controller, your mouse and keyboard will not work. This is not a problem as they will work again after rebooting your computer.

So, as you understand, you should right-click on USB device Host Controller, and select " Delete" Execute this action for all devices named USB Host Controller.

After USB removal Host Controller, reboot your computer or laptop. After restarting, the computer will automatically install necessary drivers For USB operation ports.

Find the DisableSelectiveSuspend registry key

If the USB ports are still not working, then we will go one step further and make some changes in the Registry Editor.

To go to the Registry Editor, press the keys Win+R, enter regedit, and press the " Enter" The Registry Editor window will open.

Next you need to find the registry key DisableSelectiveSuspend. It is located in the following folder: HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Services -> USB. Next, in the right window, right-click on the file “ DisableSelectiveSuspend", and select " Change».

In field " Meaning» enter number 1 . This way you will disable the Selective Suspend feature and power will always be supplied to your USB ports.

If there is no USB folder

If the USB folder doesn't exist in your registry, it's easy to create one. Just go to the Services folder, then on the toolbar click " Edit»> « Create»> « Chapter" Name it USB.

Next select new usb section, right-click in the empty window on the right. You will only have the option " Create" Click on it and select the value " DWORD value (32-bit)" Enter the title DisableSelectiveSuspend.

As we wrote above, right-click and select "Edit". In the Value field, enter the number 1. For the changes to take effect, you need to restart your computer.

Ready! Our tips should help in a situation where the USB ports on your computer have stopped working. If you know other reasons why USB ports on a laptop do not work and how to fix it, write in the comments below.

A number of laptop users may encounter a situation where USB ports on laptop not working, and devices connected through them are not recognized by Windows. This problem occurs quite often and can have many causes, making it difficult for the user to work with the USB devices he needs on his computer. In this article I will tell you why USB ports on a laptop do not work, what are the reasons for this phenomenon and how to fix it.

Causes of the problem when USB ports on a laptop do not work

So, why did the USB ports on the laptop stop working? The reasons for this dysfunction may be the following:

How to fix non-working USB ports

In order to fix non-working USB ports on a laptop, you need to do the following:

• Restart your laptop. It is recommended to turn it off completely, remove the battery for a few minutes, then put it back and boot the operating system again;
• Inspect the USB connectors of your laptop, if necessary, clean them from dust using a regular wooden toothpick;
• Try connecting your device to another USB connector; perhaps the first connector is no longer functioning;
• If you are connecting your USB device via a cable, try changing the latter, this may help the problem when the USB ports on the laptop do not work;
• Make sure that the connected USB device works; to do this, connect it to another computer;
• Go to BIOS and make sure that the USB functions are enabled;

  

• Manually recognize USB devices using the system. Click on the Start button, type devmgmt.msc in the search bar and press enter. Device Manager will appear in front of you, click on the name of the list of devices at the top (usually the name of your computer), click on the “Action” tab, and select “Update hardware configuration” there. If the system finds USB controllers during this procedure, then your problem can be solved;

  

• Remove and then reinstall the USB controllers. Go back to Device Manager as described above, find “USB Controllers” there, and double-click on this entry. A list of USB controllers will open in front of you, right-click on the first one and select “Delete”.

  

• Similarly, delete all controllers in the list. Then restart your PC, these controllers will be automatically installed by the system again, this can help fix the problem when the USB ports on the PC do not work;
• Reinstall the drivers for the USB. Usually, the laptop comes with a disk with drivers, including a USB driver; you just need to install it on the computer and the problem will be solved. If your USB connection is highlighted with a question mark or has the status “unidentified device”, then you need to find out the ID of your device, and use this ID to search for drivers on the network;
• If you have several USB devices connected, then try disconnecting them and leaving only what you need at this moment;
• Download and run a special utility from Microsoft, it can help fix problems with USB if the USB ports on the laptop are not functioning;
• Perform a system rollback to a previous working restore point. Click Start, type rstrui in the search bar and press enter. Find a restore point at which the system worked correctly and perform a rollback;

  

• If all your USB ports do not work, and the above methods did not help, then perhaps your south bridge has burned out. Its replacement (or warming up) is carried out at a service center using special equipment; contact them for advice and assistance.

Video solution to a situation where the USB port does not see the device

In this material, I examined a situation in which the USB ports on a laptop do not work, listed a list of reasons for this dysfunction and provided a number of tips for solving it. If you do not know what exactly caused these problems with USB ports, then consistently follow the entire set of tips I have listed, this will help to effectively solve the problem with malfunctioning USB ports on your PC.