I was recently given this computer by a friend to fix. It was working fine until the other day when it abruptly stopped working overnight.
When it receives power, everything in the system receives power, but no video is displayed and no POST codes are beeped. All fans are properly spinning and I can hear the hard drives kick on as well.
My first thought is that it might be the power supply. I hooked it up to a PSU tester, but it reported everything was fine.
I next attempted to get some sort of POST code out of it. I disconnected all drives and then removed one of the pairs of RAM (dual channel - two pairs making four sticks total) then the other, then finally removing all RAM from the system. No combination of RAM removal generated any POST.
Next, I thought it might be some sort of issue with the CMOS battery, so I popped it out and replaced it with a known good battery to no avail.
Finally, I thought it might be the video card so I completely removed the PCIe video card and tried it with the on-board video, but again, absolutely nothing changed.
I'm assuming the only thing I haven't ruled out is the motherboard. I've visually inspected it and I see no blown or leaking capacitors or anything obvious. Short of ordering a replacement motherboard, is there any way to verify that it's the culprit?