Newegg.com and geeks.com for under 5 bucks. I have a few spare and if one fails I try a new and and then toss out the old cable. Usually I find the cord had suffered some damage. Such as the kid was running over them with a chair or pulling them out by the cord.
The test is simple, cheap. You try a new good one.
Trouble-Shooting USB Cables:
I?m suspecting that one of my USB cables is faulty since I?m getting frequent ?hi-lo-lo-hi? tone combinations (not beeps) from MS Vista Business. I checked CONTROL PANEL\SOUNDS and they seem to be:
Device Disconnect (?hi-lo? tones)
Device Connect (?lo-hi? tones).
The usual sequence is rapid-fire ?Device Disconnect?/?Device Connect? (without a pause) ? though sometimes I even get a ?hi-lo-hi? tone sequence.
What?s the best way to check my USB cables -- economically -- without replacing them all outright < GASP! >.