My desktop comp has been trying to turn itself on and failing, not booting properly when I try to turn it on, and overall acting a bit fucked up. When I open the case, no matter what the state the computer is in, there's a light on the motherboard that's always on. I've already tried clearing the CMOS, and that got it to boot normally, but it turned itself on overnight. I entered my password, got into windows, and then it brought up the shutdown box and turned itself off. Either my computer is possessed, or the motherboard or power supply is going. What do you guys think?

Nah, I doubt that. This definitely seems like a mechanical problem. I've even tried booting with no drives connected, still nothing.

My PC had all of its updates. We have been having a shitload of storms. I looked for bad capacitors, removed my GPU and tried booting, nothing. It uses a wireless card and has been unplugged for over a night, and as for the chkdsk, I can't even get into Windows let alone see my mobo's boot screen. It just won't turn on.

And I mean I got to my desktop normally, but then the good old shutdown dialog came up:



and it shut down normally, without any of my input. I have no remote management at all enabled, and my power switch is set to "ask me what to do when pressed". I'm pretty sure that I didn't get a virus or anything, although you never know. I talked with a friend of mine, and he seemed to think that the proc was overheating. I pulled off the heatsink, and the thermal paste was basically burnt off. I'm going to get more tomorrow, put that on, reseat the heatsink, blow out the dust with canned air, perform a seance, and pray that the thing works.

EDIT: I'm pretty sure my antivirus would've caught anything, but that PC is usually used by my family and not me (other than video editing and games requiring hardware transformation and lighting, I'm on my laptop). I don't know what they could have gotten in their email. I hadn't used the thing in over a month, but got the itch to play Dawn of War again. Played a few rounds, turned it off, and then this shit started. Damn, this pisses me off!

I think that the whole "turn itself on" thing is a BIOS setting. I may have forgotten to save and quit when I changed "wake after surge".

The computer has no "model", per se. It's a build machine in an old IBM case. The mobo is an Intel. I'll have to check the model number when I get home.

If the default drive is renamed, I can just use PartitionMagic to change it, no big deal.

The problem was a faulty power switch on the case (groans and facepalms all around). It's fixed now, and boots faster since I also disabled my floppy (after fixing it, of course). Thanks for the attempted help, guys, but the real thanks goes to my friend Jacob. So, it's been re-thermal pasted and is awwright.

An old IBM case. The power switch has defects. It's a pretty common problem with the case.

Damn thing stopped working again. I've tried a different mobo, a different GPU, and a different power supply (although the only other PSU I had with the correct connectors was missing the P11 connector, so that still may be the problem). The damn thing will run the fans and everything like normal, but won't put anything on the screen. I have no BIOS, no POST, nothing, even when I remove the RAM and run with no drives. This thing is pissing me off to no end.

The board is an Intel D850GB, by the way. And I think I have no POST because there's no beeper, as far as I can see.

EDIT: Found out that if I don't have the latest BIOS (which I reset on both boards), it might not recognize my processor. That's probably the problem.