Desktop won't boot
by samurle - 2/6/10 3:34 AM
I'm trying to trouble-shoot a desktop computer that won't boot. It's a Gateway 700x. Motherboard is an Intel D850MV.
When I turn it on, I get 3 long beeps, and that's it. No video. The PSU and CPU fans are running, and the hard drive spins too,
so there is some power. According to docs, 3 long beeps mean "memory error". However, I assume if the motherboard isn't
getting enough power, perhaps the memory is good, but no power is going to it. Might also explain why there's no video.
So, I narrowed the problem down to PSU, motherboard, or memory.
The motherboard has a 20-pin ATX connector, and I happen to have a multimeter, so I probed each wire while the computer is running.
All of the wires seem to be in acceptable range, except for the blue wire. I got a reading of -30V.
The specs say the blue wire should be -12V. For people who regularly test PSUs, does -30V sound strange?
What components of the motherboard use the -12V line?