USB device unrecognized solution

Sometimes when we use a USB device, for various reasons, computer
is not recognized, but at first we suspect that our USB device is damaged, but put USB The device can be used by other computer
. The following summarizes the reasons why the common four computers cannot recognize the USB device and the corresponding solutions.

1, the motherboard USB function is not activated. Solution: Press and hold the DEL key to enter the BIOS setup window, find the “PNP and PCI Setup” setting item, and set the “USB Function” parameter under the item to “Enable” (indicating that the motherboard USB function is activated). Then save and exit to exit and enter the system.

2. The USB port is not fully powered. This situation mainly occurs in the old motherboard, and it may also be caused by connecting multiple USB devices at the same time. Solution: Connect the USB device to the USB port on the back of the main unit and unplug the other USB devices that are not used.

3, USB interface is not good. Solution: Connect the USB interface with a USB extension cable, or press the USB interface of the device slightly inside, then connect it, so that the fit will be better.

4, USB port suspended animation phenomenon, although USB devices support hot swap, but some devices (such as scanners, printers, etc.) are forced to hot pull, their USB interface is prone to false death, serious Then it will burn the interface. Solution: Enter the device manager, find the relevant device list, double-click to view, enter "Driver" in the property interface, click the uninstall button, restart, the system automatically recognizes the new device, and installs the driver. As for the method of installing the driver, the USB device that needs to be driven generally has a driver CD. When the system automatically recognizes the new hardware, put the CD into it, and click “Next” to select the CD-ROM installation.