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How to Fix a USB Port That Turns On & Off Repeatedly

USB ports were brought about in an attempt to standardize how we plug devices into a computer. Computer mice, keyboards, digital cameras, and many other electronic devices now utilize an USB port connection. A port that is not functioning as expected can be mission critical, or an infuriating annoyance at the least. A port that continuously turns off and on may not be broken, this maybe a Power Management" feature of the device. USB ports can hibernate just as a computer or laptop do. If it's dozing off is not in your best interest, you can disable this feature.

Difficulty: Moderate

Instructions

Things You'll Need:

  • Laptop or Computer with USB ports

    Turning off a USB port's power save option.

  1. Step 1
     
    Open "Control Panel."

    Open "Start Menu", select "Settings", then menu item "Control Panel."

  2. Step 2
     
    Open "System" applet.

    In "Control Panel" window click open the "System" icon.

  3. Step 3
     
    Make selections in the "System Properties" box.

    When the "System Properties" box opens, select the "Hardware" tab, then click the "Device Manager" button.

  4. Step 4
     
    "Device Manager."

    When "Device Manager" opens, click the at "Universal Serial Bus Controllers" to expand it.

  5. Step 5
     
    Right click the "USB Root Hub"

    Right-click the first "USB Root Hub" item and select "Properties" from the menu.

  6. Step 6
     
    Select the "Power Management" tab.

    Select the "Power Management" tab. Clear the checkmark from Allow the computer to turn off this device to save power. Click "OK."

  7. Step 7
     
    Four more "Root Hubs" to make changes on.

    Repeat these steps for all the "USB Root Hubs."

 
Tip:
  • "Power Users" comfortable with the "Run" command can type "devmgmt.msc" in the "Run" command on the "Start Menu" to access "Device Manager."

Source:  http://www.ehow.com/how_4970112_fix-port-turns-off-repeatedly.html