External Hard Drive Problem

[G18241]

My external hard drive doesnt seem to want to work on my pc, but works fine with my laptop

plau it into my pc with both cables (as i usually do) and it just bleeps at me, plus it into my laptop and its fine

Is this a problem with my USB ports on my PC or something wrong with the HD?

 

[G18241]

they come form the front of my pc, so mobo headers. It used to work fine, then used to play for a bit then start the bleeping, now it just isnt having any of it

 

[G18241]

also, everything else seems to work fine in the fornt USB ports, charging MP3 player for example