I dusted off a PC I hadn't booted in a while only to find it wouldn't turn on. So I checked all the connections but still no luck. The PSU won't even twitch. Thinking the PSU was bad, I swapped in another (although I really have no reason to believe the first one was bad since it worked fine the last time I booted that PC successfully).
Still no kick-over with the new PSU. So I stripped the machine down to just one stick of ram, HDD, PSU and mobo. There's no onboard graphics so I had to leave the vid card attached. Nothing. So then I stripped it down to just PSU and mobo, hoping that would at least give me a twitch from the PSU to tell me that worked. Nothing, of course.
Weird. I thought maybe the switch was bad, so I tested it. Found the switch wasn't making a good connection. Figuring that was the glorious problem, I put in a switch from another junk case. Still no love.
Ideas for testing? It's odd that the PSU won't even kick-over. Does this mean the mobo toasted itself without being connected to power? Could a dead cmos battery cause this problem? (The machine is about 6 years old, but has been run up until about a year ago.) Would a defunt mobo cause the PSU not to come on? I know they're designed to only work when properly connected (or properly shorted).