Windows system >> Windows 7 System Tutorial >> Win7 FAQ

Solution for usb unrecognized due to voltage problem of the device itself under Windows7 system

  
            
Fault Analysis: From the point of view of the phenomenon, the interface between the USB device and the motherboard is not damaged. It is suspected that the system is set incorrectly due to an unexpected power failure.
For this kind of situation, it is generally due to the power supply problem. Since the USB hard disk consumes a certain amount of power when it is working, and directly takes power through the USB interface, there may be insufficient power supply. Therefore, almost all mobile hard drives come with a separate external power supply or a PS
2 transfer interface that is powered by the keyboard. In this case, just connect the external power supply or pass PS
2 Connect the patch cord to the keyboard, make sure to give enough power to the mobile hard disk and try again. It should be ready for use.
Processing method:
From the “Control Panel”, enter the window for adding and removing hardware, delete all USB devices, reinstall it, use the deUSB device driver, restart the computer, USB device, etc. It works fine on the original faulty interface. The usb is unrecognizable, the notebook hard drive is faulty and the mobile hard disk is plugged into the front USB interface and cannot be recognized.
ps: Need to pay special attention to everyone's attention, it is recommended to ensure that there is enough power before using the mobile hard disk, otherwise it is likely that the hard disk is damaged due to insufficient power supply.
There are other possibilities that the USB interface type does not match the mobile hard disk. The USB interface of some computers is 1.1 standard. The purchased mobile hard disk is the USB 2.0 standard interface, which requires connecting the computer and the mobile hard disk. The cable must support the USB 2.0 standard.

Win7 FAQ
Windows system
How to turn off smart card service in win7 Ultimate computer?

            Everyone knows that the service functions of our Windows system are very powerful. Besid
Win7 system set timing automatic shutdown practical method

        In the Win7 system, click the Start button, and then select Open “All Programs”-
Win10 and win7 dual system boot disk self-test how to do

             Method 1: 1. Press the WIN+X key combination on the desktop to select the control pane
How to check the power usage in win7 computer?

            To be exact, many friends see the power of their own power is seen from the icon display
How to add defragmentation options in the Win7 right-click menu

            1. First, press the win+R shortcut key on the win7 keyboard to open the running window o
Win7 system double-click folder pop-up search interface solution

        In fact, the win7 system has been very stable, but after a long time, there will be certain

  • Win7 system application skills
  • Win7 system basics
  • Win7 FAQ
  • About Windows7 System Tutorial

    • How to unlock the win10 system with a locked folder?

    The new best five strokes simple tutorial

    How to quickly uninstall applications in Win8 system

    Win 8 application download error solution

    How to make the media center support more video formats

    Windows 10 Anniversary Update What's New

    More powerful than Vista Windows7 Firewall Quest

    Win8 runs the "crossing the fire" picture blur solution

    How to customize the Windows taskbar shortcut menu list?

    How Win10 binds Microsoft accounts to local computers

  • Windows XP System Tutorial
  • Windows 7 System Tutorial
  • Windows 8 System Tutorial
  • Windows 10 System Tutorial
  • Windows 2003 System Tutorial
  • Windows 2008 System Tutorial
  • Windows Vista System Tutorial
  • Windows tutorial synthesis
  • Windows Server System Tutorial
  • Linux system Tutorial
  • Computer software Tutorial
  • Windows NT Tutorial
    • Copyright © Windows knowledge All Rights Reserved