About four years ago I built this system:
Biostar TForce4 AM2 motherboard AMD Athlon 64 3800+ @ 2.2GHz 2x512MB Corsair CM2X512A-6400 DDR2 ATI Radeon X1800XT (512MB RAM with dual outputs) Antec SP-500 Power supply Seagate 80Gig SATA
It worked beautifully for about two years. One day it suddenly would not power on. It's exhibiting symptoms of a short (when you press power, comes on for 1/2 second) but I can't find a short. I removed everything but graphics, RAM and CPU, and no go. I even took the board out of the case and it did the same thing...could this symptom be a result of failed RAM? I'm thinking if I just replace the RAM it might start...Should I try new RAM or something else? I don't want to pay $70 for a service call if possible.
Edit - 10/28/2010
Ok it was my power supply. I learned that a "dead" PSU can show the same symptoms as a short. Too bad I didn't figure that out for so long--it actually stopped working two years ago (within warranty period). Just didn't have time to dig in to the problem until now. Anyway, I am going with a Corsair this time which has a 5 year warranty. We'll see...