Recently, some users have reported that after the computer is connected to the mobile hard disk, it can be recognized normally, but there are always errors in the process of reading and writing the mobile hard disk, such as “click” sound and blue screen. What is the matter?
Since USB devices are powered by USB interface, USB devices such as flash memory and digital camera can work normally at low power level of about 100mA, but mobile hard disk needs 500mA to work normally. If the USB interface of the motherboard is short of power supply, it can not provide enough current, leading to the failure of the mobile hard disk.
1. When using high-power devices such as mobile hard disk, it can be directly connected to the USB interface behind the host, not to the front USB interface, so as to avoid insufficient power supply;
2. Secondly, do not use USB extension cable to connect USB mobile hard disk. It is better to use USB cable attached by manufacturer to reduce current loss;
3. There is a JP3 jumper behind the USB interface on some motherboards, which can be used to change the power supply of the USB interface. The user can change the power supply of the USB interface, and the user can change the position of the jumper. Finally, some USB mobile hard disks provide PS / 2 interface. If it is connected to the PS / 2 interface of the motherboard, a relatively stable current can be obtained.
When the computer is connected to the mobile hard disk, if there are always errors in the process of reading and writing, it is usually caused by insufficient power supply. You can refer to the above methods to solve the problem.