Posted 09 July 2010 - 05:36 PM
We had a power outage yesterday on an unprotected pc, and now it will not boot. For maybe 1 min., there was only 60 volts line voltage until we realized there was a problem. Now the pc will not boot past the black Microsoft XP screen, and sometimes will not even count up the memory completely & continue booting; it just hangs there.
Went into BIOS had a look around, all looks ok. I loaded fail-safe defaults, still no boot. Did a test on the PS & the only thing out of whack is the -5 volts, which is dead, no reading at all. However, I don't believe that is an issue, 'cause according to my research, that circuit isn't in use in modern pc's.
This is a custom built Athlon XP 3200+. Not a new pc, but still useful. Where to look next, how to troubleshoot? Pull the mem sticks & see if it will boot? How many times will I be able to attempt booting before I hose the OS to the point of no return?
So that's where I'm at; mobo or ps, or possibly mem. got damaged? I have 2 ps testers which I used & as I said all is good there except for that -5 volt reading. So, I am calling the ps "good"? (I think)
Help me out guys!