What is the reason for the USB connector not responding to use?

Use the USB connector will not respond, the following to introduce the USB connector can not be used for several reasons: 1. Set CMOS parameters: correctly installed the driver may also appear the system can not detect the USB hard disk, which is mainly due to the motherboard's default CMOS port is closed, if you do not set it to open the state, then Windows can not detect the natural This is mainly due to the fact that the default CMOS port on the motherboard is closed. In order to solve this problem, you can reboot, enter the CMOS settings window, and in the "PNP/PCI CONFIGURATION" column will be "Assign IRQ For USB" one set to "Enable". "Enable", so that the system can be assigned to the USB port available interrupt address. 2. Insufficient power supply: Because the USB hard disk also needs to consume a certain amount of electricity when working, if directly through the USB interface to get power, it is likely to have insufficient power supply. Therefore, the mobile hard disk comes with a separate external power supply or through the keyboard power PS2 adapter interface, this time will be connected to the external power supply or through the PS2 adapter cable and the keyboard connected to ensure that the mobile hard disk to provide sufficient power and then try again, this time it should be able to use it normally. Before using the mobile hard disk to ensure that there is enough power supply, otherwise it is likely that due to insufficient power supply leads to hard disk damage. 3. USB extension cable failure: USB interface type does not match the mobile hard disk can not be used. For example, the computer configuration of the USb interface is 1.1 standard, and the purchase of the mobile hard disk is the USB 2.0 standard interface, which requires connecting the computer and the mobile hard disk cable must support the USB 2.0 standard. Because the high-speed mobile device inserted into the low-speed hub, the device may not be properly installed, and some friends in the use of mobile hard disk at the same time also use a flash drive, in order to facilitate the direct use of the flash drive attached to the USB 1.1 standard connecting cable, which leads to the USB 2.0 standard of the mobile hard disk can not be recognized correctly. As long as the cable is replaced with a USB 2.0 standard can solve this problem.

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