Owners laptop computers often have to use additional equipment. But if the laptop does not see USB, connect portable devices impossible. Specialists service center can give a detailed answer to the question of what to do if it does not work usb port on a laptop, and in which cases the problem can be solved independently, and in which it is more profitable to immediately turn to the masters for help.
USB not working on laptop
The situation when it does not see USB can arise for various reasons. However, it is not always possible to determine them. If you inserted a USB flash drive or mouse into the USB port, and the device is not detected, the problem can be caused not only by a broken USB connector, but also by a malfunction of the connected equipment or cable. Not only used equipment can be broken, but also completely new, just bought goods, so you should not exclude them from the list of “suspects” until you check it on another computer. The problem can also occur if you do not fully insert the cable of the connected device into the connector. So try to extract it and try again.
In some cases, you can immediately understand that USB does not work on a laptop: there are visible damage or traces of soot on the ports, there is a burning smell. In such situations, you should not use a faulty laptop. It is better to immediately turn off the device and take it to a service center. The wizards will carry out diagnostics and, depending on its results, install drivers, replace USB ports or other technical details.
Possible causes of malfunction
In order to understand why the laptop does not see USB, you need to take a few simple steps. As a rule, manufacturers supply portable computers with several USB ports. If an attempt to connect a new device fails, try connecting it to the remaining connectors one by one. Then check the performance of the inputs themselves using a working flash drive. Very often, it can be determined, and then we can conclude that the laptop does not see only one or two USB ports, and the rest work fine. Failure of all connectors may indicate that the south bridge has failed.
There are several reasons why the USB inputs on a laptop do not work, but the following are most common:
- driver problem;
- too high load on the port due to the use of hubs;
- malfunction of the south bridge;
- disable the USB controller function on the motherboard;
- failure due to careless handling (mechanical damage, liquid ingress).
Some models of laptops may disable the USB connectors during battery operation to conserve battery power. After the device is connected to the network, its ports begin to function normally again. In the workshop, you can determine exactly why the USB port on the laptop does not work, but even before you contact the wizard, you should try to correct the situation using software methods. In case of failure, you will not lose anything, and success will allow you to avoid unnecessary expenses.
What to do if the laptop does not see the USB device
Information on what to do if the laptop does not see USB will allow you to solve the problem yourself or make sure you need to visit a service center. First you need to check the status of the ports using Windows tools. Open Device Manager and look under Serial Controllers USB bus. Yellow Exclamation point point to possible problems with a port, and double-clicking on it will provide more detailed information.
The next step is to check the BIOS (Integrated Peripherals or Advanced, then USB Configuration). If it is in the Disabled position, change it to Enabled, save the changes and reboot. In most cases, the problem is solved. If the USB port is still not working, you can try to go to the Device Manager and delete all USB controllers in it so that the system will install them on its own at the next boot.
Laptop repair - does not see USB device
If your laptop still does not see the devices connected to the USB port, call the wizard or take the technician yourself to. USB repair on a laptop, depending on the complexity, can take about four to five hours, but it will cost much less than buying a new device.
The specialists will diagnose and repair the USB port of the laptop at an affordable price, as well as explain what to do so that the problem does not reoccur. After the repair work is completed, you will again be able to use the mouse, flash drives and other devices that are connected via the USB connector. The work is guaranteed.
In this article, we will look at a few effective ways repair damaged USB port at home. Let's get started...
The USB port (Universal Serial Bus) is a standard interface cable connection for personal computers. It is used to transmit digital data over short distances. Two USB ports allow different devices establish a connection with each other and jointly perform one specific task. If necessary, such ports can even transmit electricity (for example, charging a phone through a laptop).
Such ports are used mainly for connecting peripherals (keyboards, mice), as well as for receiving or transmitting data via USB drives.
Why is the USB port of my computer or laptop not working?
The main reasons for the termination of the USB port:
- Incorrect BIOS settings.
If you are unable to enter the BIOS because the USB port is not working, use a keyboard with a PS/2 plug. To correct this error, you need to go to the section BIOS-Advanced. Now open subsection Onboard Devices Configuration. It contains the settings responsible for the functioning of USB controllers. If they are in a disabled state, enable them. - No connection to motherboard.
Often, a contact can simply go away in a computer. Any shaking and, especially, an unexpected fall of the device can cause a disconnection. Check if the USB1 and USB2 connectors are securely connected. - Cable damage.
It is possible that the reason why the computer cannot recognize the connected USB device is that it is itself damaged. In most cases, this is due to cable damage. - Lack of electricity.
Any electronic equipment requires some nutrition. If there are too many devices connected to your computer, there is a chance that they simply do not have enough electricity to fully function. Therefore, try disabling unnecessary ones in this moment devices and check the functionality of the priority device. - Device drivers.
One of critical aspects normal functioning of devices - drivers. Often we either completely forget or update on holidays every five years. Therefore, if you encounter a non-working USB device, we recommend that you try updating the drivers for it. - Controller damage.
This is perhaps the most difficult and unpleasant outcome for any user, as it forces you to spend some money on repairs. If the USB controller on the motherboard has been physically damaged, there is no other way to fix the problem other than taking the board to a service center for repair.
How to repair a USB port
Checking mechanical damage
Before proceeding with more complex techniques, we recommend that you pay attention to the physical state of the port. Connect the USB cable and gently move it around in the connector to determine how loose it is. If you do not know the standard density of the nest, check first in the running.
A sufficiently high freedom of movement inside the port indicates that it is loose and needs to be replaced.
The main thing to remember is not to make sudden and strong movements, since there is a high risk of damaging a healthy port without finding the real cause of the breakdown.
Restarting the computer
In rare cases, the operating system may simply not notice the new installed equipment. So to fix given error, restart your computer. Windows will rescan the list of connected devices and display the flash drive you need or external hard disk.
This section deals directly with the hardware and its software. Very often, devices cannot function normally because a driver has failed or the controller has stopped working correctly. We have prepared for you two ways inside the utility that will help you quickly return the USB port to working condition.
Method one:
1. Open . You can do this in the following way: Right-click on the icon My Computer > Computer Management >.
Alternative way, and perhaps more convenient for some, open the utility Run, in the opened dialog box enter the command devmgmt.msc and press Enter.
2. Open section. It must contain two controllers with the name Intel(R) 7 Series/C216 Chipset Family USB Enhanced Host Controller. Depending on the manufacturer, the names may differ, however, some USB Host Controller must be identical.
3. Now click on the icon.
4. Restart your computer.
Method two
An alternative way is to remove these two controllers before the next restart. This will allow the Windows operating system to independently make the necessary settings before starting.
USB Pause Option
USB Port Temporary Disable Option - windows tool, which allows the computer to increase the time battery life. This is especially true for laptops. Thus, the operating system temporarily stops supplying power to the USB port, which has been idle for some time. To restore the stable operation of the port, you need to perform one of the two following instructions:
Method one. Power options.
1. Open with keyboard shortcut Win+I.
2. Go to section System.
3. Go to subsection Power and Sleep.
4. Scroll down the page and in the section Related options open .
5. Select the power plan you want and go to Power plan settings.
6. Go to section.
7. Find a section USB parameters and expand it.
8. Now open subsection USB Pause Option.
9. Change parameter values On battery and Off the grid on the Forbidden.
10. Click Apply and OK to confirm your changes.
Method two. Registry editor.
When working with the registry, it is important to remember that the health of the operating system directly depends on its state. Never, under any circumstances, make rash changes to it. Therefore, before proceeding with this method, we strongly recommend that you do backup register.
1. Open the utility Run by pressing keys Win+R.
2. In the dialog box, enter the command regedit and press Enter.
3.
Go to the following path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USB\DisableSelectiveSuspend. If it is missing, you will have to create it manually.
4. Create a new DWORD value (32 bits).
5. Give the parameter a name.
6. Right-click the key and click .
7. Install Meaning equal 1 and press OK.
Ready.
Check if your USB port is working.
Replacement of damaged equipment
If none of the methods described above could help you, there is a high chance that the USB port has been irreparably damaged. The only thing that can change the situation is to replace the connector at the nearest service center.
We hope you found this article helpful and helped you get your USB port back up and running.
In work computer technology Various failures and malfunctions may occur from time to time. Many users are often looking for an answer to the question: why does the USB port not see the device? In fact, the connection of USB devices to the computer may not be detected operating system Windows due to an error.
Who is to blame and what to do?
The first thing to start with finding out the reasons for this "behavior" of the system is to check the health of the device connected to the computer. To do this, you can use another device.
If the error repeats on another computer, it can be concluded that the USB device being connected is the cause. Whether to hand it over for repair or buy a new one is a decision at your discretion.
One of the reasons for the error may be the presence of bad contacts. “Guilty” in this, as a rule, is the long-term operation of mice and keyboards of the wired type. Constant kinking of the cable can damage the inner wire and cause this problem.
Very often the error occurs due to static electricity. USB devices are a kind of storage media electric charge, therefore, when they are connected to computers, an electrostatic field often arises and the voltage rises. In this case, the protective system is activated, and all ports for connecting USB devices are automatically disabled.
How to fix the problem?
There are several ways:
- First of all, you need to disable computer device from power supply. If you experience such a problem with a laptop, you need to free it from battery. When the above steps are completed, wait 5-10 minutes, return the battery to the laptop, and connect the computer to the network. To your surprise, the ports will work!
- You can use another method to solve the problem. If the error occurred against the background of several simultaneously connected USB devices you need to turn them off. Then the device that was not recognized must be reconnected to the computer. As practice shows, this method is effective.
- If the above methods did not provide the desired result, you can use another one. One of the reasons for the error may be incorrect driver installation. The problem can be resolved by disconnecting all USB devices from the computer ports. After that, you need to find Windows 7 C:\Windows\System32\DriverStore\. and delete the INFCACHE.1 file on the computer.
The next time the flash drive is connected, a new correct file with exactly the same name is created.
We hope that the above information will be useful for you and will help in solving the problem.
Hello dear site visitors! In this article, I would like to tell you about why the computer does not see the flash drive and what to do to fix it.
Reasons why the computer does not see the flash drive.
Before you decide what to do, you need to understand the reasons, and there can be many.
Reason #1. The USB port on the front of the computer is not connected.
This is one of the main reasons. Most often, people insert a USB flash drive into the USB port on the front of the computer, as this is very convenient. But it happens that during assembly, the masters forgot to connect the front panel to the motherboard. As a result, the flash drive is not visible, and you still can’t insert headphones into the front output :).
Reason number 2. Not a working flash drive.
This is the second of the main reasons. Flash drives, like everything in this world, do not last forever, sometimes they break. Most often they burn out.
Reason number 3. Virus.
Where without them :). Unfortunately, when transferring data from a computer infected with a virus, two things can happen:
- The files on the flash drive will not be visible, I talked about how to solve this problem in this article -
- The flash drive itself will not be visible.
Well, your computer may also be infected, and because of this, the computer does not see the USB flash drive.
Reason number 4. Driver failure
Driver failure is very rare. However, it has its place.
Reason number 5. File system conflict.
It happens that the FAT file system on the flash drive, and NTFS on the computer. Sometimes these file systems conflict. Because of this, the computer does not see the flash drive.
Reason number 6. Faulty USB port.
Sometimes it is not the USB flash drive that is faulty, but the USB port itself.
We have covered the main reasons. And now let's still figure out how to make the flash drive visible.
We get rid of problems.
We decide first problem— the USB port on the front panel of the computer is not connected. Unfortunately, many people cannot solve this problem on their own, because. the front panel is connected to the motherboard, and for this you need to know where to “plug the cord”. If you want, you can call the master, and he will connect everything for you, it should not be expensive. However, there is an easier way out - connect the USB flash drive to the rear panel, which also has USB ports.
Problem #2- Not a working flash drive. If the computer does not read the flash drive at all, then most likely it simply burned out or failed. And there's nothing you can do about it, except to throw out this flash drive and buy a new one. But it happens that when the computer “inserts” the flash drive, it makes a sound, but the flash drive itself does not show. This most often refers to 3, 4 and 5 reasons.
Understanding with the third problem ie with the virus. To do this, you need to check all disks and file media on the computer. That is, we insert the flash and check the PC in full. I talked about how to do this in the lessons and
Problem number 4- driver failure. And here you have to puff, but in principle, nothing complicated.
In this particular case, you need to update USB drivers port. To do this, you need to go to the Device Manager. The most convenient way to do this is:
Also, the device manager can be opened using the command devmgmt.msc in Run. You can read about how to do it.
Now we find the item "USB Controllers" and left-click on the small button to the left of this inscription.
We are given a list of all the USB ports that you have on your computer. Next, you need to insert the flash drive. After that, a change will occur on one of the lines (you will definitely notice it, because the entire device manager will seem to flash). On the newly appeared, or changed, line, right-click, and select "Delete".
With this action, we will remove the driver.
After that, remove the flash drive and insert it again. Everything, we updated the driver.
If updating the drivers didn't help, then it might be a file system conflict. Here we are sneaked up on the fifth problem.
We will solve it by formatting the flash drive in the file system we need.
To find out what file system you have, go to Computer -> Right click on drive C
Select Properties. And it will show you what file system you have.
We will format the flash drive using the program HP USB Disk Storage Format Tool, this program sees the USB flash drive even when the computer does not see it (unless, of course, it is the difference in file systems that matters).
I talked about how to format a USB flash drive using this program in an article. You can also download this program there. The only thing is that, in the File system item, choose the system that you have on your computer, in my case it will be NTFS.
well and solve the problem for reason #6, the easiest. If your USB port is faulty, then just try to “plug” the USB flash drive into other USB ports, and if they don’t “function”, there is only one way out - a repair shop.
Well, what if a laptop can't see the flash drive? It's still easier, because there are fewer reasons.
- Not a working flash drive.
- Virus.
- Driver failure
- File system conflict.
- Faulty USB port.
And you already know how to deal with all this.
Well, that's all. See you soon!
Hello! Today we will analyze in super detail what to do if a computer or laptop does not see flash drive. Before proceeding with any action with a flash drive, read the article to the end - this is IMPORTANT!
"Mobile" flash drives are the undisputed leaders among devices for storing personal data. However, malfunctions in their work occur regardless of the brand: idea: and your version.
Let's figure out how to act if a computer or laptop does not recognize a flash drive. The rest of the article lists all known issues and most effective ways to solve them, but first try these two simple solutions:
Try installing the flash drive in another computer or laptop.
No matter how trite it may sound, but before sounding the alarm, try restarting your computer. This solves the problem 50% of the time.
Necessary theory for understanding - Flash drive: to live or not to live.
Practice shows that in case of malfunctions in the operation of flash drives, it is quite difficult to return both user data and device performance.
You can safely say goodbye to a flash drive when the circuit is electrically closed, mechanical damage chip or contacts on the board, controller failure.
To find out " survivability» flash drive, insert it into the computer. If the system does not show a new device, and the LED on the case is off, then, most likely, the drive cannot be reanimated.
If, nevertheless, the flash drive shows signs of life (the LED indicator is on), but does not work, then there are solutions, we will deal with possible reasons.
Do not forget that flash drives have a limited lifespan - when active use just a couple of years.
The device can simply work out its own or burn out from a voltage drop, be damaged due to careless handling.
Possible problems with the flash drive.
Most often, the problem lies precisely in the flash drive, its compatibility and characteristics. The following are typical problems for flash drives and recommended user actions.
The methods described belowWorks on both XP and Windows 10and younger. The main difference is the modified interface. Commands and section names remain the same.
1st reason: Unformatted disk.
If, when starting a flash drive, the system asks it to be formatted before starting work, does not pass to user information and shows the absence of files, then the problem is clear, and formatting is inevitable, but there are cases when a virus hides all files, for this reason I gave a solution in this video:
If above described problem does not fit, then go to the properties of the flash drive, click on the option - Format disk ( Important: when formatting data, data recovery will be very difficult) and select the appropriate NTFS or FAT 32 file system (see below: File system conflict).
If valuable data was stored on the drive, use the fast mode. Then try to restore deleted files using utilities, but this method does not always allow you to achieve a complete return of files (see below: Recovery programs flash drive).
Before proceeding with active actions, test the USB flash drive on another device. There is a chance that the flash drive is "buggy" or was incorrectly disconnected.
2nd possible reason: Cleaning the USB connector.
If the flash drive is quite old, has been in more than one bag in its life, and also serves as a decoration, then its connector could become clogged. Accumulated plaque and dust can cause"invisibility" and similar "glitches" like not starting the first time or low reading speed.
However, the chance to bring the flash drive to such an "unreadable" state is quite small. A small object like a match or a hard wooden toothbrush will help to eliminate litter and dust. Carefully walk along the contour and blow the flash drive.
Avoid sharp metal objects that could harm the device.
The 3rd possible reason is Autorunner viruses.
- Click Apply and Ok.
- We go through "My Computer" to the media and delete the file called Autorun.inf.
- Run the flash drive with antivirus. After that, we highly recommend that you format it.
Note! If a virus has settled on a computer, then most often antivirus treatment does not help (especially for drive E - there is such a reason ...). You will have to reinstall the OS and drivers.
4th reason: Problems with the computer (does not see the flash drive).
Computer problems are less frequent and easier to fix. The most common failure is inactive USB port. Consider the possible reasons:
Lack of nutrition.
Often a failure occurs if the drive is connected to connectors with front system block. Such a nuisance is familiar to users of personal computers that use primarily the front panel. The main reasons are:
- lack of power on the front panel (port goes out);
- the front USB port is not connected to the power supply.
Decision problems will be connecting the flash drive to the ports on the rear side. A more productive way is to connect the cable to the motherboard.
The appearance of the cable is different for each model of the system unit and depends on the number of ports. Focus on the color of the cable and the markings standard for all D-, D +, VCC and GND.
Disabled or burnt USB port.
Sometimes a computer can't see flash drive due to a port failure. In this case, not only the flash drive is not displayed, but also other devices.
The main reason is damage to the contact or disconnection of the USB connectors in Bios. If you should contact the workshop with a burnt port, then you can curb the BIOS yourself, for this:
- When the system boots, press F2 or Del - depending on the BIOS version.
- Finding a tab Advanced, then USB Configuration.
- Check that next to the inscription USB Controller is highlighted line Enabled– permission to use ports.
- Save your settings.
note that bios settings differ by different models motherboard. Once again, without a significant reason, you should not edit them.
Difficulties with sections.
Another one possible reason- problems with partitions. At the same time, the computer recognizes the flash drive, but gives out a characteristic sound and an unfamiliar label with an arrow appears in the lower right corner. As a result, the system does not assign a partition letter to the new device (for example, F). To fix the problem:
- right-click on USB and from the proposed options select "Change drive letter", in the pop-up window select Change and letter from the proposed options;
- save, try.
File system conflict - MacOS.
A system running NTFS might not like it "flash drive" with FAT32. File system conflicts can cause these kinds of problems.
Most often, conflicting flash drives are faced by owners apple products. So, for Mac OS the main file system considered ExFAT or MacOS Extended, which is not read by Windows.
To resolve the conflict will have to format drive, having previously decided on the file system suitable for your PC.
See you in the next article, in order not to miss new articles and information, subscribe to RSS- here is the link: (you can unsubscribe at any time).
