Dell XPS 420 Vista 32 Bit two short beeps - perhaps mother board memory bank?
 

Not a problem I have had before. When booting up, I get two short beeps and the computer asks I either check RAM F5 (did full tests and all tests come up fine), continue with F1 or do F12 for set up. I have tried all and am unable to find anything wrong. The two beeps started about three weeks...