Self-test USB device solves the problem that the interface cannot be used

        The direct cause of the computer usb interface can not be used:

⒈) is usually encountered many of my friends can not use a USB interface, a lot of the problem lies in the USB device

some time ago, a friend bought a smartphone But I want to download the music and mobile phone desktop background image to the mobile phone SD card. After connecting the data cable with the mobile phone and the computer, the mobile phone screen is also displayed in the charging state, but in my computer in the computer, how is it? Can not find the existence of removable disk (SD card), friends anxious to think that there is a problem with the USB interface of the mobile phone, let the system look at it. However, Xiao Bian looked at the phone. After unlocking the phone, I found out that there is a prompt on the phone to open the USB device. After I choose to open it, I will display the removable disk in my computer. Through this example, I want to say that if you encounter a USB interface that does not respond, it is best to think about whether the device has a switch, whether the USB cable is connected, and the new device is best to look at the instruction manual. The best way is to change the USB port and re-plug it several times. It is not recommended to try another computer to check whether it is a computer or a device.

⒉) USB problems of their own

USB interface issues can be divided into hardware problems can be divided into software problems, let's start with the software say it, such as the USB device driver is not careful to small Deleting or disabling the USB device in BiOS will cause the USB interface of the computer to not respond, so the USB interface will definitely not be used. In this case, we first need to confirm that the USB device is no problem. For example, we can use a USB device such as a wireless mouse or a USB flash drive to be used on another computer. If there is a problem with this computer, it can basically be confirmed as a USB problem.

Solution:

first look on this computer is problematic USB front interface or the rear interface, very often we will find some computer front USB port is not available, But the latter can be mainly because the front USB interface is provided by the chassis, and the USB interface cable of the chassis needs to be inserted in the corresponding position of the motherboard, but many installed friends may forget to plug the USB front cable, so that the front USB The interface can't be used, and the USB interface on the back of the chassis is directly integrated into the motherboard, so there is no connection. Therefore, the USB interface cannot be used. It is better to use the USB interface on the back of the chassis.