What to do if the computer does not see USB

What to do if the computer does not see a USB flash drive in Windows

There are two main reasons why the computer may not see the flash drive: hardware and software. In the first case, the problem is in equipment, t.E. Physical. In the second case, the setting of the Windows operating system will help. Everything described also applies to memory cards, external hard drives, SSD and any other USB information drives. Next, select your fault version.

Usually, there is a LED on flash drives that signals that it works. If earlier the LED glowed, but now not, then this means that power is not supplied to the device. In any case, if nothing happens at all, there is no specific sound when connecting a flash carrier, you have several options:

  • Rearrange the USB flash drive to another USB port;
  • Rearrange the USB flash drive in the USB port on the system unit;
  • Insert the drive directly into a computer or laptop, without using any extension cord and USB hubs.

Determine the reason for USB ports or in the flash drive itself:

  • Insert the drive into another computer or into a smartphone via an OTG-adapter (the phone must support OTG);
  • Connect any other USB device to verify the performance of the ports.

Now I will explain, some ports may not work, simply because they used to be burned before or contacts have deteriorated there. Look into them, if you can see dirt and garbage, then blow it well. Then, if there is an overload on the power supply of a USB port, it will not work. Over, in order to “put it in order” it is necessary to completely de.Energize the computer, taking out the cable from the outlet for 1 minute. The laptop needs to be turned off and the battery is 1 minute.

Current overload can be connected when many USB devices are connected or one, but consumes a lot of energy, for example, a smartphone for charging, a fan, an air humidifier, a heating device or a table lamp.

Further, the USB nests on the front panel of the system unit may not be connected to the motherboard. In order for them to work, you need to open the cover of the system unit and connect the wires from the front panel to the corresponding pins on the motherboard. You can be guided by hints on the motherboard itself or download instructions for your model on the Internet.

Your USB flash drive may not work specifically with hubs and USB units, but more often such embarrassment happens to external hard drives. They are very demanding on the quality of the cable and nutrition. Poor cables carry out weak current, there is a drawdown in voltage.

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If the USB ports do not work, then it makes sense to enter the BIOS and check if they are included there. In different versions of BIOS and UEFI, the settings for turning on/disabling USB ports will be in different places, you need to walk along the menu, usually it is “Advanced. USB Configuration “. It is necessary to switch the property “USB 2.0 Controller and USB 3.0 Controller (if any) in the Enabled state:

Hardware problems of flash drives

The causes of the malfunction of flash drives are:

  • Mechanical damage. Chipping of parts, cracks, dumps of the connector.
  • Electric damage. Failure of electronic components of the board.
  • Sitting firmware.

By the way, the first can cause the second and third, if you connect a broken flash drive to the power source.

You can reanimate a flash drive with a mechanical breakdown with your own hands if the defect is not too serious, and the owner knows how to solder. It is also often possible to restore the firmware in the event of a rally on the case of a rally if the flash drive is not “no name” from the basement of the Chinese factory. Software-firmware and applications for their installation, can be found on the websites of USB devices and specialized web resources. There are usually instructions there.

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In the case of electric damage, the flash drive can behave as “dead” or destabilize the operation of PC. Cause disconnecting, rebooting, freezing, and violate the work of other equipment. Repair in such cases is often inappropriate. It is cheaper to throw out and buy a new one if there is no important information on it.

USB connectors disconnected from power

This is another reason why the computer may not see a portable medium. When assembling or repairing PC, the user or master sometimes forgets to connect the front panel to the energy system, and it is in it that USB flash drives are most often inserted. Naturally, no devices connected to a de.Energized panel will be recognized, as well as their indicators will not glow. Often, along with USB ports, they remain without power and, accordingly, do not work front inputs for headphones and microphone.

The solution here can be double. If access to the contents of the carrier needs to be obtained urgently, you can insert it into the rear connectors of the computer. This, of course, will not solve the reason for the problem, but momentary access to the flash drive will be obtained. So that the front panel can be used in the future, it must be connected to the motherboard. In principle, there is nothing complicated about this, and although the PC buildings can differ significantly, all the cables have their own connectors, so the probability of mistakes and connect to the front panel is the wrong cable almost reduced to zero.

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However, if you have only a vague representation about the contents of the system unit, it will be preferable to call the master to the house.

USB Port Not Working or Not Recognized on Windows 10, 8, and 7 (5 Fixes)

Connecting the panel to the energy system does not give a 100%guarantee of the work connected to it drives. In some cases, they may not have enough nutrition, especially if many other consumers have already been connected to the PC. Try to turn off part of the devices, connect the flash drive to the rear panel, and be sure to check the power supply. It must provide all the components of the computer with a sufficient amount of energy.

Equipment setup

After installing the Windows 10 operating system on your computer or switching to it from previous versions, it can happen that the peripheral devices connected through the USB ports often turn off or even stop working correctly, giving out a warning icon in the form of a yellow triangle in the dispatcher of devices, as well as error code 43 in the description. What to do in this case? First you need to determine the culprit. Of course, if several devices fall off at once, then it is clear that they are most likely not to blame and the reason lies in the computer itself. If only one device is buggy, then the following manipulations need to be carried out for diagnosis:

-Try switching to a neighboring USB separation. This advice is especially relevant if the system unit stands somewhere under the table in the dusty corner and wipes only once a year. And then, before that you need to see if it is clogged with dust or garbage.

So, we came to the conclusion that the reasons for the problem with USB ports are hidden in the computer. Let’s look for them!

Outdated drivers and bios

Very often, outdoor or incorrect drivers are to blame for the shin. This is especially noticeable when updating the system, when everything worked perfectly on the old OS, and after updating on Windows 10, glitches with an error of 43 began and the “device is not recognized”. To fix it, you need to go to the site of the manufacturer of the motherboard, look for a new version of software and install it. Alternative option. Download the online client Drivers Solution Pack and launch with it to update the drivers.

Usually after this malfunctions are eliminated completely and irrevocably.

I also want to talk about a couple of cases when problems with USB ports on Windows 10 appeared due to an outdated version of BIOS. Over, both times it was not on old decrepit pieces of iron, but by the new ASUS laptops after updating the pre.Installed “eight” to “dozens”. It was decided by the download of the latest version of the BIOS from the official site and flashing the motherboard using a special utility that was included.

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Reinstalling the port concentrator

Sometimes this trick helps to fix errors with USB: click on the “This computer” icon with the right button and select the “Management” item. You will open a system equipment “Computer Management”. In it you need to select the section “Device Manager”:

Here we find the section “USB controllers” and open it. We need a “root USB concentrator” item. We click on it with the right mouse button and select the “Disable” item. Close the window and reboot the computer. Again we return to the dispatcher and turn on the concentrator. After that, all USB ports should earn without problems.

Setup settings

This case is especially relevant for owners of laptops, netbooks and ultrabooks. The fact is that, in order to save the battery energy, they activated the function of selective disconnecting of the devices and if at a certain point in time many consuming gadgets are connected to the computer (phone charge, card reader, portable column, etc.P.), then Windows 10 can selectively turn off one or more devices at once.

To disconnect this option, we go to the device manager and open the properties of a root USB concentrator. On the Power Management tab, it is necessary to remove the box “Allow the disconnection of this device to save energy”. After that, close the dispatcher and reboot.

Lack or incorrect installation of USB drivers

The reasons related to software malfunctions in Windows 7/10 can be detected using the device manager. If you notice that one or more devices does not work specifically on the port used, then this may indicate that the problem is in the device itself. Open the control panel and go to the device manager section. All connected devices will be displayed there. If the list contains points near which there is a yellow exclamation mark or instead of the name an unknown device, then the problem is in this very device. There may be several options for malfunctions.

Often USB inputs stop working after reinstalling Windows 7/10. The reason is the wrong installation of drivers or the necessary drivers may not be found at all. Will have to select and installation manually.

Often, to eliminate the malfunction, you just need to update the drivers. So, if the automatic update of Windows is disabled, and the system itself was installed for a long time, then the relevance of the software is lost, system errors may appear. The device begins to work incorrectly, or even ceases to function at all. For updating (reinstalling) the USB controller, you can use the CD/DVD-disk with drivers for the motherboard or download the necessary drivers from the site of the manufacturer of the system board.

Also, using the device manager, you can turn off the power saving function for all ports. Expand the list of USB devices used in the sections “USB controllers”, “Mouse and other indicating devices”, “Keyboard”. We click twice with the mouse on the desired device to open the properties window. Now we switch to the “Power Management Management” tab and remove the box “Allow the disconnection of this device to save power supply”. Thus, the device will always be involved in any circumstances.

If some equipment is not recognized, then there may be either the problem with the drivers already known to us, and the hardware problem, which consists in the absence of contact, damage to the cable or the controller malfunction. Over, there is often a situation when, when connecting a faulty device, the rest stop working normally. The keyboard begins to freeze, as well as the mouse, and the printer stops printing. The problem is similar to a lack of power, that is, the consumption of all power goes to a faulty device in which there may be an ordinary short circuit or other malfunction.


It would seem, well, can there be something worse than the slow operation of the device on the USB port? As much as it can! A new device stuck in a USB port may not earn at all.

The most amazing thing is that in fact, it’s not scary at all. Just the other day I ran into a similar case, so I will share my impressions.

So, having stuck a USB gadget just purchased in a free USB port of his computer, the user can get a message on the screen:

Hardware problems

If the computer stopped seeing the phone through USB, and you did not change anything in the settings of both devices, then the problem can be hardware. There are three elements that participate in the connection: USB port on a computer, cable or connector on a smartphone. Enough to fail one of them.

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Defective cable

Unfortunately, cables sometimes break. They suffer from excesses near the plugs, from pressure or rupture, from grinding. If, because of this, the integrity of at least one of the cables of the cable is violated, then it will be impossible to transfer data on it.

Perhaps you took the cable from an inexpensive charger. Their creators sometimes save and generally do without cores for data transfer, installing only power wires. With such a wire, the phone can be charged, but the computer will not see the connected device. How to check:

  • Connect another device by the same cable (player, tablet, camera. It does not matter, if only the entry connector was the same);
  • Connect the phone using another cable.

If in the first case the connected device is not visible, and in the second the phone is recognized, then the case is in the cable. What to do:

  • Use another cable;
  • If the cable is fushed and there is no other, try to bend it in such a position today so that the connection is. But tomorrow get a new one;
  • Try to use wires extremely neatly.

How to Fix USB Ports Not Working in Windows 10/11

Non.Working port on PC

Sometimes on computers, desktop or laptops, USB ports fail. If you have suspicions that the case is in the connector, do the test like this:

If in the first case the phone is recognized, but in the second the device was never found, then the port is a problem area with a high probability. What to do:

  • If you are connected through a hub, replace it. A defect in one port can safely spread to the rest;
  • If you are connected directly to the computer, while using another port. But at the first opportunity, send PC for inspection and repair to the service center.

Non.Working connector on the phone

If you suspect that the port on the smartphone spread from frequent connections and may turn out to be a “weak link”, check the phone.

  • Make sure the phone is connected in data transmission mode.
  • Connect the phone to the same PC the same, and then with another cable.
  • Connect it to another PC by the same, and then with another cable.

If in all cases the connection was not determined, then the case is on the phone. What to do:

  • Send a smartphone for repairs. If it is equipped with wireless charging, then for some time you can work with it without using the port. But such use will be inferior, so it is better to correct the defect immediately;
  • For the future, if possible, use a wired connection, if possible, as often as possible, wireless charging and transfer of files through Wi-Fi or clouds.

Unlike the first two cases, nuances with a “drowned port” are possible here. Sometimes in smartphones (especially in “off.Road” models) the port of MicroUSB or Type C to increase security slightly “leak” into the case. To connect through such a port, you need a special cable with a slightly elongated plug.

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Therefore, if you have a protected phone, use it only with a complete cable or immediately buy an appropriate spare. The standard of standard length in this case is most likely not suitable. As you can see, in most cases, the problem is solved without the involvement of specialists; If the defect is serious, then it is necessary to hurry with the repair. And then your smartphone will be easily connected to the computer again.

Connect the phone to a computer or laptop via the cord, and the computer does not see the phone

Many users, when trying to connect a phone to a computer using a USB cable, are faced with the fact that the computer does not recognize the connected gadget. A connected device is charged. At the same time, there is no access to the smartphone itself and its internal filling. I have encountered this problem of synchronization, and in this material I will tell you: why does the computer do not see the phone through USB, and also share various methods for solving this issue.

Connection of the phone to the computer via cable.

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