All USBs work. USB ports don't work
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, You can do it in a not quite 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-working ports appear on the screen, but the flash drive is still not readable or a peripheral device cannot be connected to the laptop, it is possible that the problem lies with this 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 arises when a large number of external devices are simultaneously connected to the laptop.
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 turning off 1-2 peripheral devices allows you to check the assumption.
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 simultaneously pressing the 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 the USB Controller section (there may be several of them 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 Double-click the properties of the hub and go to the power settings.
If the problem was incorrect power consumption settings that caused the laptop to automatically turn off the ports, there will be a check mark here to allow the hub to turn off power.
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 - a yellow triangle with an exclamation point, indicating that the equipment is not working properly.
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 new 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 first needs to 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 to manually configure updates, the application will automatically replace drivers for almost every part and even update some programs - this usually takes several hours.
Rice. 8. A utility for searching and updating control programs and other applications.
USB technology is one of the most important of the huge number of technologies that have had a great impact in the computer world. USB (stands for Universal Serial Bus) is a serial interface designed for data transfer for medium and low-speed computer peripheral devices.
This technology has made working with scanners, printers, as well as external devices (USB flash drives, external hard drives) truly easy and convenient. All actions related to the installation of USB devices come down to the “Plug and use” principle. These devices have become truly mobile thanks to USB technology. Today, laptops, desktop PCs, as well as various gaming devices, cameras, smartphones, navigators, TVs and other devices are equipped with USB ports.
USB 2.0 ports transfer data at speeds of up to 480 Mbit/s; in the USB 3.0 version, the maximum transfer speed rises to 5 Gbit/s. The USB symbol is a kind of trident that is drawn on both USB devices and computer connectors.
This technology has already been sufficiently studied and has undergone many improvements, and therefore USB ports rarely cause any problems when used correctly, and troubleshooting problems associated with them causes little hassle. In this article we will look at the basic principles for troubleshooting any problems that may arise with USB ports.
- If the USB ports on the motherboard are mechanically damaged, they should be disconnected from the motherboard (connectors on the front of the case) or sealed with tape so that they are not used. Such ports should be replaced with new ones in a workshop at the first opportunity.
- Do not connect devices if there is visible mechanical damage to the USB connectors, and do not connect devices if there is external damage to the case or there is a burning smell.
- Do not overload USB ports. The current in them is limited: for USB 2.0 - 500 mA, for 3.0 - 900 mA. Do not increase the number of USB ports using different USB multipliers. New motherboards have up to 10 ports, which is quite enough. It is safer to purchase an additional PCIe or PCI USB controller than to work via a USB “tee”.
- Before connecting USB, it is recommended to touch the grounded body of the system unit to remove static voltage. Static discharges are often the main cause of failure of USB devices.
If the USB ports stop working on a laptop, then it becomes very difficult to work on it - you cannot connect a scanner, a printer, or a flash drive. Unlike desktop computers, installing an additional USB controller is quite expensive.
When error messages like this “USB device not recognized” appear, in most cases, the problem may be with the USB port. This problem can be solved quite easily, because it arises at the software level.
Any hardware device interacts with the operating system through a driver. Most device problems are resolved using drivers. This also applies to non-functional USB ports. Below we will look at several ways to help troubleshoot USB ports at the software level.
Restart your computer
If the ports suddenly stop working, and the computer does not detect the USB device, then the easiest way to fix the sudden problem is to restart the computer. Restart your computer. If there were no problems loading the drivers, then this problem will be eliminated after a reboot.
Update hardware configuration in Device Manager
If restarting the computer is not desirable at the moment (for example, some important operation is being performed), then you can “reload” the driver without restarting the entire computer using Device Manager. To launch it, you need to right-click on the “My Computer” shortcut and select “Manage”. Or go to the “Start” menu and find the “Run” program there, launch it, and then enter the command devmgmt.msc in the field.
A window will open in front of you, where you need to left-click once on the list of devices, then click the “Action” tab in the main menu and point to the “Update hardware configuration” button. The “USB Controllers” section should appear in the list of devices. If it appears, it means your problem has been solved and the USB ports should work.
Disabling the USB controller
Another way to get the USB ports to work is to unplug and then reinstall the USB controller. To do this, launch Device Manager. We find the USB controllers section in the equipment list. In this section, right-click on each of your devices, then delete them all. Once all controllers have been removed, restart your computer. The controllers will be reinstalled and the USB ports will become available again.
Updating USB controller drivers
The reason for USB ports not working may be damage to the USB controller drivers. The solution is to find the correct drivers and reinstall them. To download the appropriate drivers, you need to find out the manufacturer of the specific USB device port. By installing the correct driver, the problem should be resolved immediately.
Disabling other USB devices
It happens that USB ports do not work because they are overloaded when there are too many USB devices connected. USB hubs sometimes do not provide sufficient power to the devices connected to it. Some connected device can use the full power of the USB controllers. If the equipment is connected to a USB hub, then reconnect the device to the USB port directly.
You can leave your device connected to the USB hub, but you must first turn off other devices in the hub. Buy a USB hub that has its own power supply, which will provide sufficient power to all devices connected to it.
If none of the above methods helped you, then most likely the USB ports are physically damaged. Or the USB controller, the south bridge on the motherboard in particular, is damaged. In this case, it is best to repair or replace the USB port controller at a service center.
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USB connectors rarely break and are very easy to use. But when they fail, it causes a lot of trouble. In this article we will present to your attention the simplest solutions to this unpleasant issue.
First, restart your computer. Sometimes there are situations when drivers stop working due to some system error. So restarting the system can correct this situation. If it is not possible to restart the PC, for example, because some important program is running (say, installing an application), you can try reloading the drivers. To do this, follow the path “Start – Control Panel – Task Manager” or go to “Start”, click “Run” and enter “devmgmt.msc” in the field. In the new window, select “Action”, and then “Update hardware configuration”. If the USB controller appears in the list, then the problem is solved. You can also try removing and reinstalling the controller. Let's say right away that this method works very rarely, but in some cases it really helps. Go to Device Manager again. Find the USB connectors section and right-click to remove them. After restarting the computer, when the OS loads, new drivers will be installed themselves. In some cases, the problem will be caused by damage to the drivers themselves, and therefore they will need to be updated. But this process is quite complicated, and it is better not to do anything yourself, but to contact a specialist.
This technology has made working with scanners, printers, as well as external devices (USB flash drives, external hard drives) truly easy and convenient. All actions related to the installation of USB devices come down to the “Plug and use” principle. These devices have become truly mobile thanks to USB technology. Today, laptops, desktop PCs, as well as various gaming devices, cameras, smartphones, navigators, TVs and other devices are equipped with USB ports.
USB 2.0 ports transfer data at speeds of up to 480 Mbit/s; in the USB 3.0 version, the maximum transfer speed rises to 5 Gbit/s. The USB symbol is a kind of trident, which is drawn on both USB devices and computer connectors.
This technology has already been sufficiently studied and has undergone many improvements, and therefore USB ports rarely cause any problems when used correctly, and troubleshooting problems associated with them causes little hassle. In this article we will look at the basic principles for troubleshooting any problems that may arise with USB ports.
To begin with, we will describe the basic recommendations for working with USB ports and devices connected to them:
If the USB ports on the motherboard are mechanically damaged, they should be disconnected from the motherboard (connectors on the front of the case) or sealed with tape so that they are not used. Such ports should be replaced with new ones in a workshop at the first opportunity.
Do not connect devices if there is visible mechanical damage to the USB connectors, and do not connect devices if there is external damage to the case or there is a burning smell.
Do not overload USB ports. The current in them is limited: for USB 2.0 - 500 mA, for 3.0 - 900 mA. Do not increase the number of USB ports using different USB multipliers. New motherboards have up to 10 ports, which is quite enough. It is safer to purchase an additional PCIe or PCI USB controller than to work via a USB “tee”.
Before connecting USB, in order to remove static voltage, it is recommended to touch the grounded body of the system unit. Static discharges are often the main cause of failure of USB devices.
If the USB ports stop working on a laptop, then it becomes very difficult to work on it - you cannot connect a scanner, a printer, or a flash drive. Unlike desktop computers, installing an additional USB controller is quite expensive.
When error messages like this “USB device not recognized” appear, in most cases, the problem may be with the USB port. This problem can be solved quite easily, because it arises at the software level.
If the USB ports don't work
Any hardware device interacts with the operating system through a driver. Most device problems are resolved using drivers. This also applies to non-functional USB ports. Below we will look at several ways to help troubleshoot USB ports at the software level.
Restart your computer
If the ports suddenly stop working, and the computer does not detect the USB device, then the easiest way to fix the sudden problem is to restart the computer. Restart your computer. If there were no problems loading the drivers, then this problem will be eliminated after a reboot.
Update hardware configuration in Device Manager
If restarting the computer is not desirable at the moment (for example, some important operation is being performed), then you can “reload” the driver without restarting the entire computer using Device Manager. To launch it, you need to right-click on the “My Computer” shortcut and select “Manage”. Or go to the “Start” menu and find the “Run” program there, launch it, and then enter the command devmgmt.msc in the field.
A window will open in front of you, where you need to left-click once on the list of devices, then click the “Action” tab in the main menu and point to the “Update hardware configuration” button. The “USB Controllers” section should appear in the list of devices. If it appears, it means your problem has been solved and the USB ports should work.
Disabling the USB controller
Another way to get the USB ports to work is to unplug and then reinstall the USB controller. To do this, launch Device Manager. We find the USB controllers section in the equipment list. In this section, right-click on each of your devices, then delete them all. Once all controllers have been removed, restart your computer. The controllers will be reinstalled and the USB ports will become available again.
Updating USB controller drivers
The cause of USB ports not working may be damage to the USB controller drivers. The solution is to find the correct drivers and reinstall them. To download the appropriate drivers, you need to find out the manufacturer of the specific USB device port. By installing the correct driver, the problem should be resolved immediately.
Disabling other USB devices
It happens that USB ports do not work because they are overloaded when there are too many USB devices connected. USB hubs sometimes do not provide sufficient power to the devices connected to it. Some connected device can use the full power of the USB controllers. If the equipment is connected to a USB hub, then reconnect the device to the USB port directly.
You can leave your device connected to the USB hub, but you must first turn off other devices in the hub. Buy a USB hub that has its own power supply, which will provide sufficient power to all devices connected to it.
If none of the above methods helped you, then most likely the USB ports are physically damaged. Or the USB controller, the south bridge on the motherboard in particular, is damaged. In this case, it is best to repair or replace the USB port controller at a service center.
We are always happy to help you. Contact our service center -
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Hello, dear readers! Every time you start the computer, all devices installed in the computer are initialized, data about drivers and various utilities is read. But sometimes there comes a time when a device connected to a personal computer is not detected by the operating system.
It is at this point that we have an anxious moment and wonder why does not workUSBport? What exactly is the matter and what needs to be done to make the port work? In the end, as they say, there is a way out. But first, let's figure out how everything works and what the essence of this material is.
So, many of us use the USB port constantly when working on a computer, as if it is impossible to do without it, although in fact it is so. In computers, as you know, USB ports are present not only on the front panel, but they can also be seen on the front panel of the system unit case, for example in the card reader.
So, at present, the USB port is the heart of the system, so to speak, the exchange of information that can be transferred at any time to the PC system available at that time. I am already silent about the fact that using ports it is possible to enter data into a computer (mouse, keyboard). The location of ports on a personal PC is always different; it is worth adding that in advanced systems and gaming platforms, additional USB ports are installed.
As always, as it usually happens, one fine day a moment comes when the USB port does not work, that is, the USB port simply hangs, glitches, is not detected by the system, or rather, it does not work correctly. In today’s article, I suggest you consider the reasons, as well as solutions, for a non-working USB port.
We wonder why the USB port does not work?
Firstly, if when you connect a flash drive to a computer or some other equipment, the port does not work quite correctly or the device connected to the computer is not detected by the system at all, then in this case you should make sure that the controller on the PC motherboard is turned on .
Quite often, users forget to turn on the USB controller. It seems like a simple, but still common problem when the user starts the PC, but the device is not detected. It’s possible to fix everything here; to do this, you need to go into the BIOS and enable the corresponding parameter. By the way, if you don’t know what a BIOS is, then I recommend that you definitely read the article
So, go to the BIOS and find the item “Integrated Peripherals - this applies to Award BIOS”, or to Ami BIOS - Advanced”.
Next, press “Enter” and go to “Onboard Devices Configuration” and make sure that the “USB Function” and “USB 2.0 Controller” items are in the “Enabled” position. If everything is so, then everything is included. Otherwise, the parameter can be turned OFF, position “Disabled”. If the option is disabled, you should enable it. Next, save the changes, then reboot the PC system and check the functionality of the USB port. Be sure to check whether the USB ports on the front panel of the system unit are connected to the motherboard itself using the so-called connector.
If the port still doesn’t work, then we move on.
Secondly, or maybe the problem is that the port is not working and is completely hidden in the USB extension cable? For example, there are situations when the computer does not recognize a peripheral device (printer), for the simple reason that the USB cable itself is simply damaged. The reason for cable damage can be very varied, for example, you accidentally placed a chair on the cable or some heavy object and simply pinched it. Therefore, do not be lazy to check the cable itself.
Third, it is quite rare to encounter such a problem when the USB port does not have enough power. I will give you a specific example. Imagine that you have connected a flash drive and a printer to the front of the system unit case in the USB connector. As a result, the operating system, when sending data for printing, informs us that the document could not be printed. In general, your computer simply does not see the printer. And if you restart the computer, the printer is detected by the system, and you can easily print a document. However, after a while, the computer again loses connection to the printer and the printer does not print. Do you know why?
This seemingly trivial problem at first glance is due to the fact that there is a lack of power for the USB port. As a result, the USB port refuses to function properly. Basically, such an incident associated with a lack of power occurs when connecting several devices to the front panel of USB ports.
Of course, not always, but such situations still occur. These USB ports are connected to the motherboard using a cable. In addition to transmitting data, this cable also powers the USB hubs themselves. It is possible that the power supplied simultaneously to two devices connected to the USB hub may not be sufficient. In this case, I can recommend that you connect the printer to the built-in USB port, which is located on the PC motherboard.
You can also change the CMOS battery on the board. It happens that the problem completely disappears after replacing the battery on the motherboard. What kind of battery is this and where it is located, you can find out in this article:
In general, if you have does not workUSB port, which is located on the front panel of the system unit case, then try replacing the USB hub itself. Who knows, maybe it is the one that is faulty.
You can also try plugging the cable into another USB connector on the motherboard.
Fourth, if the USB port controller, which is responsible for identifying and starting the device itself, has failed, then things are, of course, bad. There is, of course, the opportunity to take and resolder the controller itself on the motherboard, but this takes time, you need to have the controller itself, and, of course, the soldering station itself. From a time-cost point of view, it is not entirely advisable. Another option is to entrust it to specialists, although this also has its pitfalls, price, quality of work, as well as the competence of the specialist who specifically works on this problem.
Fifthly, peripheral and mobile devices may not be recognized on your computer due to the lack of drivers and special software. It cannot be ruled out that if you have been using your operating system for quite a long time and the system has not been updated at all, and in general the Windows build is not the original version, then in this case it may be that the drivers are considered outdated and therefore in the system Freezes happen all the time.
Sometimes Windows disables the USB hub altogether to save power. To keep your USB device from disconnecting, you will need to do the following:
Open “Device Manager” by right-clicking on the “Computer” shortcut and selecting “Properties”.
After the Device Manager window has opened, double-click with the left mouse button on “USB Controllers” and expand the branch.
Now all you have to do is go to the root USB hub and in the “Power Management” section uncheck the box, as shown in the figure below.
At sixth, sometimes reinstalling the operating system helps fix the problem when does not workUSBport. Although, of course, first try to roll back the system to its previous state. Here is an article that will tell you how to do this:
Seventh, perhaps there is some faulty equipment in your system, which actually serves as an obstacle to the normal operation of the USB port.
This problem is very relevant in our time. After all, quite often users directly encounter this. So, there is a solution. USB ports on a computer may become stuck, contacts may short out, and many other additional problems may occur when working on a computer.
We find a way out of our situation, check all devices for connection and disconnection. You will need to disconnect all devices and connect one at a time, for example, connect the keyboard first and see if it works, then connect the next device, let it be a mouse and so on. Connect additional USB devices, if they don’t work, then the problem is solved or you need to look in peripheral devices, maybe there’s something shorting there, but who knows.
Eighth, they completely forgot to enable the serial bus controller in the device manager. There are times when you don’t pay attention to the operation of USB devices, turn on the computer, download music, listen and enjoy new works of art. True, everything comes unexpectedly, suddenly you need a USB device, and then there is silence, it doesn’t work. The thought immediately comes to mind, maybe the controller is not turned on, let me take it and check, it is so.
Each PC has a device manager that shows which devices are connected, whether all drivers are installed and updates made.
In general, I think that you probably already know that if any driver is missing, the system automatically marks it with a yellow exclamation mark, this means a malfunction, as a result, with two clicks of the mouse you open an additional window, information about the code is displayed here malfunction and the possibility of its restoration.
Ninth, if all of the above methods did not give a positive result, then I recommend that you install a USB PC controller on the motherboard.
If your computer has a low-power power supply, for example 300 W, then it is likely that the cause of all the troubles is hidden in it, install a more powerful power supply, say 500 W, and check if the USB ports are working.
Concluding today's article, I would like to say that it is not always possible to easily find the culprit of all problems, sometimes it is not enough to simply reinstall Windows to find out what really happened.
If there are no drivers for serial bus controllers and the controllers themselves are marked with an exclamation mark, in this case you should either install drivers for the controller, or you can remove all controllers and restart the computer. After the computer boots, the system will try to install them again, and perhaps all USB ports will work properly again.
So, to summarize today’s article, we can only note that if the USB port on the computer does not work, then the cause of all the troubles may lie in both hardware and software. In general, I have said everything I wanted to tell you about today.
How do you like today’s article and what can you add to everything said above? In the next issue you will find out =>
