This one is odd, my nephew built his first computer, it's a beast, but it has a problem. In fact this problem has been going on since he bought it, well over a year ago, so any warranty is now up. He's a lazy jerkface so now I'm going to try to troubleshoot it knowing returning any part is not an option.
I'm going from memory here on what's in it, and I can update later when I get a better look, but here's the computer and the issue:
AMD Phenom quad-core, with some motherboard
4GB ram (2x2GB 800mhz)
some powerful video card, I'm gonna say ATI Radeon 4890
Sata hdd, ide dvd burner
Wireless G internal PCI card
Not too specific but the problem is unique: sometimes, after a shutdown or a reboot (which doesn't restart) the computer will not come back on unless you wait 40 minutes. You press the power button, fans spin - no system beep, no case lights, nothing happens, other than knowing power should go through (and is on because of the fans and lights on the motherboard and gpu). It's not posting I guess. But according to him it seems more time based. It won't come on, if you try it again in 10 minutes, and still nothing, you have to wait another 40 minutes or so.
Now, this isn't all the time, but he says the most reproducible way is letting it go to sleep. It will not wake up from sleep, ever, it will always do this. Last night I took out all the nonessential parts to help troubleshoot it, and while I got it to boot, I missed getting into the bios to check settings, and when I restarted it again it wouldn't come back up. It's at my place so I plan to switch out more things like RAM and video card. My guess is it's the power supply, but I'm really not sure, I haven't heard of anything like this.
Before thinking it was the power supply we thought it was heat related, and while after he built it it did crash, redoing the thermal paste solved that, and the computer never crashes in a game or the desktop - this issue is strictly with shutdown, reboot, and always with sleep - which he's disabled because of it. He's also run heat monitors and system and cpu temp is normal. Operating system is Win 2008 Server R2 (essentially Win 7), and before that it was the Win 7 Beta and then RC - OS shouldn't have anything to do with this though.
Any ideas, or suggestions beyond what I'm already planning?
Wii U: DHS-Odium // Live: DHS Odium // PSN: DHSOdium // Steam: dhsykes // 3DS: 0318-6615-5294