If you're getting a "memory error" then this usually means that one of your memory sticks is bad; power down your computer, unplug the power cord and pull out all the sticks, replace one by one.
Meaning; put one stick in and boot your PC, if it boots fine, then power down, pull that one out (label that stick "good"), replace it with the next stick, and reboot again...repeat this process with all your memory sticks until you find the one that is dead (or dying).
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?