PC wont booot....

[KenA]

Howdy..myy father in-law's Pc crashed the other day and i was given the job of trying to sort it.

basically, it got the BSOD from nowhere..no hardware or software installed. When he tried to re-load windos from a CD it made an attempt to boot from CD then swithched off. Now, it tries to boot for between 5-20 secs then switches off.

i took out RAM, graphics card and same problem. I disconnected the power supply to test it and i'm getting the correct 12V, 5V and 3.3 V from the respective 20 pin connector.

I'm stumped...any ideas?

EDIT: WHile the 20pin connector was connect to the motherboard i was getting 3.3V on the 12v & 5 V rails. It was only when i disconnected the connector from the board that i got the correct voltages ( i shorted out psu_on to Gnd to spin up the PSU).

[pegazuz]

[liljim]

Ran into this with an Gigabyte board myself, it turned out to be a bad motherboard. RMA'd got replacement board only to find the same prob 6 months later. Changed model and back on track now.