How to make usb ports work on a computer. USB ports on the computer do not work - ways to solve the problem

Reasons why they don't work USB ports on a laptop, can be in both software and hardware. Sometimes all ports do not function at once, and sometimes only one or two. Below we will look at why such malfunctions appear, and also tell you what to do about them. self-elimination, if repair of the connector itself is not required.

Checking the BIOS configuration

If a problem like this occurs, the first thing you need to check is whether the USB controllers on the system board. They can easily turn off on their own, and no repair of the connector is required. When the controller suddenly stops working, you can activate it in the BIOS:

Immediately after booting begins, frequently press Del, F2 or another function key provided to enter the BIOS on your device.
Find Integrated Peripherals or Advanced (depending on BIOS version).
Select USB Configuration. Here, opposite the USB Controller lines, the Enabled parameter should be set. If it's not there, put it up desired value yourself and save the current configuration.

The problem can also sometimes occur due to some USB device that needs repair. To determine it, turn off all devices using this port- mouse, USB keyboard, etc. Try connecting a working flash drive. If problems stop appearing, look for a non-working peripheral device.

Working with Device Manager

Through “Start” or another way, go to the device manager. Perhaps one of the group of USB controllers here is marked with a yellow exclamation mark icon, which is why the device does not function.

You can try to correct the situation in the following way:

Remove the controller marked in yellow from the manager;
Reboot your laptop.

The next time the system starts, it will reinstall all the necessary software, after which the controllers that failed can start working again. Sometimes it helps to roll back the OS to a previous state, when all the equipment was functioning normally.

USB may be disabled due to system settings

The laptop's power management can be configured in such a way that the system itself, to save battery power, turns off the USB connector after a certain period of inactivity. No repairs are required here. In order for the laptop to stop disabling the USB input, it is enough not to allow Windows to change the power settings of the controller, for which:

In the manager, open the serial bus controllers branch, highlight the line for the root USB hub.
Double click to open the device, select power management.
Uncheck the box that allows the system to turn off the connector to save power.

Repeat the described steps for each of the USB hubs registered in the device manager.

Problems with the motherboard driver

Sometimes USB port not working problems can be caused by an outdated motherboard chipset driver. The problem is solved by downloading it from a reliable source and then installing it. To do this:

If you don't want to bother searching latest version driver you need, you can simply use the application DriverPack Solution, which automatically recognizes devices with outdated drivers and will update them.

When Windows is to blame

Sometimes OS failures are the cause of non-functioning controllers, so repairs are required by Windows itself. In this case, you need to reinstall. But to be sure of the cause of the problem and not have to do unnecessary work, check the functionality of the USB ports without booting Windows.

To do this, you can, for example, boot the system from any Live CD. If the ports work as expected in this disk OS, then the problem is clearly in Windows - you can safely reinstall it. If the devices do not work even when booting from a Live CD, then the problem should be looked for in the hardware; it may need to be repaired.

So, most often software problems Non-working USB controllers can be resolved by updating the driver for the chipset or the motherboard itself (which is essentially the same thing after the north and south bridges on the motherboard have been replaced with one chip). Also, the problem often goes away after reinstalling the OS. Otherwise, the controllers themselves, connected USB devices may be faulty, or repairs need to be done on the system board itself.

Endless shutdowns are one of the typical problems with X7 A4Tech mice. Even genuine mice from. I have collected here many solutions to this problem:

In this article I will describe cases when X7 mice turn off due to non-working USB ports and USB controller drivers. However, these tips are also suitable for other USB mice.

Restart your computer

So what to do if USB port doesn't work ? First of all, you should simply restart your computer. Quite often drivers stop working due to a random error, so after a reboot the problem will go away.

Sometimes it is not possible to restart the computer (for example, due to some important program). Then you can reload only the drivers without restarting the entire computer. To do this, you need to go to Device Manager. This is done like this: Start -> Control Panel -> Device Manager. Alternatively: Start -> Run -> enter devmgmt.msc.

In the window that appears, click the “Action” tab, then “Update hardware configuration”. Now we check whether the “USB Controllers” section appears in the list of devices. If yes, then the problem is solved and your USB ports should work.

This updates the hardware configuration in Device Manager.

Sometimes a situation arises that USB controllers are in Device Manager, but the ports still do not work. So do if USB port doesn't work ? You can try removing and then reinstalling the controllers. To do this, again go to Device Manager (see above). Among the list of equipment we find a section with USB controllers. Using the right mouse button, delete them all and then restart the computer. After rebooting, the controllers will be reset and the USB ports will work again. However, this method It rarely helps.

Here you can remove USB controllers.

Updating USB controller drivers

In especially severe cases, USB ports do not work due to damage to the USB controller driver - I wrote about this in the article. The remedy for this is to install a working driver, and to do this you will have to find out the manufacturer of the USB ports. The easiest way to do this is through the device instance code (equipment ID) - article). Installing a suitable driver usually solves all port problems.

Disconnecting unnecessary USB devices

Sometimes USB ports become overloaded. Typically, at such times, there are too many devices connected to USB hubs and they do not provide enough power. It happens that just one device consumes the entire permissible power of USB controllers. In such cases, it is enough to connect the device directly to the USB port.

Alternatively, the device does not need to be disconnected from the USB hub. But to do this, you will have to disconnect all other devices connected to the same hub. In general, I would recommend using a USB hub with its own power supply. Then it will be able to provide power to any USB devices and you will no longer worry about " do if USB port doesn't work " .

If all else fails

If none of the above methods helped, then there is mechanical damage to the USB ports. Or USB controller and (as an option, the south bridge of the motherboard). In such cases, the most you can do is to replace or repair the USB controller at a service center.

So, first you need to clarify - USB stopped working on computer or USB stopped working on laptop. The strategy in each case will be slightly different, and the sequence of actions for self-diagnosis and restoration of the correct operation of the universal serial bus controller (USB, Universal Serial Bus) will also be slightly different.

Diagnostics of USB in a computer and methods for repairing it

If they stopped working Computer USB, it is necessary to carry out a number of activities:

If USB on the front panel of the case does not work desktop computer , then a mechanical failure is more likely to occur;
or at USB connection housing system unit(4 wires; 2 of which are signal, and 2 provide power) to the terminals on motherboard(so-called front panel) an error has occurred - the USB is not connected correctly (the polarity or the sequence of the data transfer wires is incorrect);
To check the correct connection and avoid more serious damage to the computer’s motherboard, you need to connect a known working device, such as a flash drive, to the connectors located on the back of the system unit - USB motherboard fees. At the same time, never rush to connect devices to the front panel - there is a risk of burning the flash drive if the polarity is not observed.
Thus, if the flash drive is detected at the back of the system unit, but does not want to work at the front, we conclude that the contact in the USB panel is broken (the soldering at the junctions with the wire and the connector itself often breaks off), it is damaged USB connector (this fact easily detected by visual inspection), the USB hub connector on the motherboard is not connected correctly or is not connected at all; to do this, you will have to remove the protective casing of the system unit and assess the condition, armed with a manual with the correct indication of the connection sequence.

For each motherboard, it is better to look at the sequence separately, since there is a direct sequence (reverse), a horizontal position of the block and a vertical one. It is worth paying attention to the colors of the contacts and the block (if it is painted in some way), or the colors of the contacts and their location relative to the metal contact pins of the block (especially the missing pin).

If connecting to the USB connectors on the motherboard did not give anything, you should pay attention to the color of the USBs themselves - black or blue. If the USB to which the flash drive is connected has blue(the plastic inside the connector itself is painted blue as in the picture), this indicates that we are trying to work with USB port 3.0. This is a more powerful connector in all respects, but also more problematic. The point is that such USB connectors may not work after Windows reinstallation without separate drivers, or does not work correctly with some devices even if they are available. This situation can lead to both the inability to work and various types of failures - blue screens and computer freezes.
Therefore for full diagnostics We look for the black USB connector and connect to it. If the device is detected, we conclude that the problem is with the drivers for USB 3.0. To fix this problem, install the drivers from the motherboard kit or, best of all, download them from the manufacturer’s website.

If devices are not detected in any of the USB ports, then perhaps the reason is in the controller, then purchasing separate device called expansion card USB2.0-PCI or USB3.0-Mini PCIe, since repairing a USB controller for a computer motherboard is not cost-effective. The boards cost differently and differ in speed characteristics and power supply.

USB2.0 board is traditionally cheaper, less speed, suitable for old computer; but may not fit into the new one, with motherboard MicroATX format (small board with one PCI slot).

A USB3.0 board is usually more expensive, more powerful and faster, but is not suitable for an old computer; can be applied if PCI slots occupied or obscured by the video card.

Here is a set of work to diagnose and restore functionality for a USB computer - for a laptop it may be somewhat more complicated (or easier).

Self-diagnosis and repair of a USB laptop

Diagnostic algorithm and USB repair A laptop is similar to a computer, but there are some features. Firstly, the diagnosis is very simple, and secondly, the repair is quite complicated. I want to immediately warn you that accurate diagnosis is best carried out after complete reinstallation Windows, since there is a possibility of a previous installation of drivers and recording of erroneous parameters, which will lead to the impossibility of restoring correct operation laptop.
Diagnostics consists of testing the operation of the black and blue connectors on the laptop (USB2.0 and USB3.0). If USB3.0 does not work— we try to connect the USB flash drive to connector 2.0 (black), if USB2.0 works, we conclude that we need drivers for USB3.0. It is best to use official sources with drivers for these purposes, i.e. laptop manufacturers' websites. Various drives Auto-installation of drivers may or may not help. Therefore we need high-quality repairs laptop - be prepared to push yourself (this applies to everyone).
If you find that even after reinstalling Windows, none of the existing USB ports work, that’s bad. One hope is that someone simply turned them off through bios - go into bios and turn them on. Otherwise, most likely the controller has failed or problems have arisen with south bridge laptop motherboard. In any case, a complex laptop repair will be required, which can only be carried out at a service center.

Naturally, before this it is necessary to exclude mechanical damage to the laptop’s USB ports, which can also lead to short circuits. This situation will be characterized by the following phenomena: the laptop turns off when USB is connected, or the laptop turns on and immediately turns off. Mechanical damage can be assessed visually by looking into the slot of the connector: if all the hardware is in place, everything is in order. Moreover, you will have to inspect all the connectors, and not just where you want to attach the flash drive. If a problematic connector is detected, the laptop will need to be repaired -.

The reasons for problems due to which USB ports on a laptop do not work can be completely different - from hardware failure to “lost” motherboard drivers or the controllers themselves.

However, usually the user can cope with most problems on his own, without turning to specialists - if he knows how to do it.

If there are a lot of USB ports on the laptop (for example, 3 or 4), the problem may not be so critical, and its solution can be postponed.

But if there are only 2 connectors or there is a constant need to use connected devices - flash drives, and even printers - the issue should be resolved as soon as possible.

Moreover, some methods will take no more than a few minutes.

First Troubleshooting Steps

A message that appears on the screen about the USB ports stopping working or the laptop not responding to a drive installed in the corresponding slot may indicate.

Sometimes you can solve them with a simple reboot - there is a small chance that the fix will happen automatically.

Increase the likelihood of the positive effect of a reboot, which actually sometimes helps, maybe not quite in the usual way:

1 Completely disconnect the laptop from the power supply (if it was, for example, charging);

2 Remove the battery and leave the laptop in this state for about 5 minutes;

3 Insert the battery back and turn on the device.

If no messages about non-functioning ports appear on the screen, but the flash drive is still not readable or the peripheral device cannot be connected to the laptop, it is possible that the problem lies with this particular equipment.

The assumption is tested by connecting gadgets to other ports of the laptop - or to another computer.

Other USB devices

Another problematic situation with USB ports occurs when simultaneous connection to laptop large quantity external devices.

For example, a user has already connected three gadgets ( , and ) to four ports, and then tries to install a flash drive as well.

Sometimes such a drive simply will not be detected by the system - and you can check the assumption by turning off 1-2 peripheral devices.

Most often, this situation occurs not when connecting peripherals directly to the laptop, but when using a “hub” (USB hub that increases the number of connections).

You can solve the problem by reducing the number of connected devices - or even better, by removing the hub and connecting all gadgets directly.

Incorrect BIOS configuration

You can find a list of ways to solve problems with USB ports.

Sometimes using this interface it is possible to enable self-disabling controllers on the motherboard.

To activate, you need to perform several steps:

Reboot the system while pressing function keys to enter the BIOS (for some laptops this is F1 or F2, for others - Del or Esc).
Select the Advanced or Integrated Peripherals section.
Go to the USB Configuration menu item and change the parameter value in USB section Controller (there may be several of them and with different names) to Enabled.

After a reboot, the hardware configuration on the laptop will change, and USB ports that were not previously recognized by the system may appear to be working.

System Settings

A laptop running on battery power can automatically turn off some controllers to save energy - especially if it approaches critical values.

In this situation, first of all, you should connect the laptop to the network, and then change the power settings, by following these steps:

1 Open Device Manager.

2 Select the branch indicating serial bus controllers.

3 Find and open the USB root hub subkey.

4 Open double click properties of the hub and go to power settings.

If the problem was incorrect settings energy consumption, due to which the laptop automatically turned off the ports, there will be a check mark in the box that allows turning off the power to the hub.

By removing it, you can restore the functionality of the ports.

The steps are repeated for each hub if there are several of them on the laptop.

Driver problem

The problem may be - and in most cases it is - in problems with USB drivers.

You can find the problem by going to Device Manager(via computer properties or by typing in mmc devmgmt.msc).

It is possible that one of the ports is marked in the list with a special icon– yellow triangle with exclamation point, signaling equipment malfunction.

You can try the problem solve in one of 2 ways:

Try updating the drivers (preferably an Internet connection) in the properties of the USB controller.
Remove the device marked with a yellow triangle from Dispatcher And restart laptop.

When using the second option, the system rebooted will try to install a new one software for discovered “new” equipment. Sometimes this will restore port operation.

For the first option, you may need to find out the ID number by which the corresponding driver is searched on the Internet - this identifier is located in the device properties on the details tab.

The problem, which is the motherboard drivers not working properly (this usually happens with outdated laptops released several years ago), is solved by downloading and installing the appropriate software.

To do this, the laptop user must first find out - for example, use the AIDA64 application, which is paid, but works without entering a key confirming payment for a certain trial period.

The name of the device will help you identify and msinfo32 command, entered in the “Run” form (called by the Win + R keys).

You can try to find drivers for the corresponding board on the website of its manufacturer - or on the resource of the company that developed the chipset.

You should know: If you don’t have the time and experience to find and update drivers, you can use the DriverPack Solution utility. After installation on the laptop, it will independently check and update all the necessary software. The disadvantage of using this method is that if you do not choose manual setting updates, the application will automatically replace drivers for almost every part and even update some programs - this usually takes a few hours.

Rice. 8. A utility for searching and updating control programs and other applications.

There are different types malfunctions related to the operation of the front USB ports on personal computer. Sometimes a problem occurs when all the front ports do not function. In other cases, when only one does not work or works poorly. We will try to talk about each of the situations when USB ports do not work.

Simultaneous failure of all front ports

First, it is necessary to clarify that the front ports differ from the rear ones in that they are connected to the “motherboard” through a special cable, while the latter are part of the motherboard.

First probable cause The solution to which USB ports on the front panel of the computer often do not work is to disable the USB port controller. It is located on the motherboard. You can enable it using BIOS menu. You can get here by restarting your computer and pressing one of the keys. This is usually the F2 or Delete key.

In the BIOS you will need to go to the Integrated Peripherals section. There is a USB Configuration menu here. You need to find out what position the USBController is in. If it says Disabled next to it, it means the controller is not working. Switch to the Enabled position. Save the changes and restart the computer.

You can check all USB ports by going to Device Manager. It contains the section “Serial Bus Controllers” USB connectors" Some of the items may be marked yellow exclamation point. Why? This indicates a malfunction or bad work one of the ports. Detailed information is in context menu, called by right-clicking on the device name. It is worth deleting all controllers in the “Manager” and then restarting the computer. Windows OS is capable of restoring all controllers at boot time on its own.

The Windows operating system sometimes disables one or all front ports specifically to save power. We can manage our own nutrition, so our task is to at this stage– prohibit the system from doing this. We will again need the “Device Manager” and the “Universal USB Bus Controller”. Next, click on the line “USB Root Hub” with the left button. Here we go to the “Power Management” menu. Uncheck the “Allow shutdown to save energy” checkbox. We do this procedure with each USB.

There is another reason why they do not work, it lies in failures or malfunction Windows systems. Most often this happens if operating system Constant updates are disabled. It is highly desirable to restore lost system files or reinstall Windows completely. Problems with the front ports arise due to incorrect OS assembly. Therefore, it is important to use only proven Windows builds.

What to do if only one front USB input does not work

One of possible reasons The reason why this happens is that the cable connecting the front ports to the motherboard is faulty. Then the problem with the operation of one of the ports is solved by replacing this cable yourself or with the help of specialists.

The malfunction may occur if we connect several devices to the front USB ports, for example, at once external drive and a phone or something else. There may not be enough electricity for one of them. This situation leads to both port shutdown and intermittent operation. This happens because the front port interface may not have an additional power source, that is, an adapter. Sometimes we don't notice that the front USB ports are faulty. Problems arise only when the main adapter is not sufficient for our immediate needs. And they can be solved by purchasing a USB hub with an additional power source. After replacement, we are able to connect any peripheral devices.

Before you begin any of the operations listed in the article to correct deficiencies, you need to check the contacts connecting the cable to the motherboard. A lot of problems with front USB ports can be solved this way.