External USB powered hdd turns off display

Hello,
this a strange problem,

Whenever I plug in a Flash drive in my front panel USB ports it runs perfectly....but when I plug in the external 2.5 inch Usb powered hdd to the front panel USB ports...the display goes off and then a have to pull the cord to turn off the pc and restart it.

But when I plug it in rear ports it runs just fine....what can be the problem ????

Mobo : M4A89GTD PRO/USB 3
Cooler Master 690 II Advanced pc case
Sapphire Radeon HD5870
AMD X6 1090T CPU
Western Digital Passport 500 gb External drive
3 answers Last reply
More about external powered turns display
  1. Either your front USB ports are wired wrong, or there is a problem with the motherboard. Check the manual for the USB wiring from the case to the motherbaord. You may have a bad cable also between the 2.
  2. I know this is really old, but I figured I'd add to it for future reference. I had the same exact issue and oddly I had the same exact mobo. I am going to replace my motherboard with something different, and I will let you know if it solves the issue.
  3. gibsonfirebird12 said:
    I know this is really old, but I figured I'd add to it for future reference. I had the same exact issue and oddly I had the same exact mobo. I am going to replace my motherboard with something different, and I will let you know if it solves the issue.


    What happened now...is it solved ?
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