Hi, everyone.
Wow, a lot of do-it-your-selfers here. Very cool. I've been building "Frankenboxes" for a while, and it's good to see that I'm not the only one.
My rig, from the outside, looks like a cheap AOpen clone. It's not bad on the inside, though. Has 8 bays for hard drives, 4 bays for CD/DVD and other full-height devices, and is pretty easy to work on. This machine has evolved over many years, and will continue to evolve. Here's what's under the hood right now:
[ ] Intel DP45SG Mobo
[ ] Intel Q9550 2.83 Quad Core, OC'd to 3.1 ish with huge StarTech Cooler
[ ] 16GB OCZ 1333 mhz DDR3 RAM (4 x 4GB)
[ ] 4 WD 500 GB SATA drives, raid 1 (mirrored)
[ ] ATI HD3870 Video, 512MB, minor OC
[ ] 750 Watt P/S - AMD branded (I told you it was a Frankenbox!)
It's a real sweet gamer box - but I have run into a problem with the DP45SG that others on the Intel site seem to have seen as well - but have a hard time explaining or fixing permanently: If you unplug the power from the back of the rig, and let it sit for 10 minutes, then plug it back in, the power light on the on-button is on - as if it were already on. Press the power-on button, and the rig starts ok. But once it's on for a little while, and you want to do a reboot - well, that's where the second funky thing happens. EVERY reboot makes the system shut down, pause a moment, and then restart. But after a few of these, it won't restart again. It just sits on the black screen - no BIOS, no anything. Unplug the box and let it sit for 10 minutes - and you're good to go.
By the way, once it's running, it works fine, runs cool, and gives me no grief. Play for hours at a time with no hiccups.
Now, to let you know what I have tried so far to fix this thing (after many hours searching for clues on the Interweb):
1) Swapped out power supplies and verified all power / switch / panel connections
2) Removed the MoBo and installed a thin, plastic insulation layer in the case to prevent grounding and shorting issues
3) Swapped out RAM a few times. Seems like the MoBo is very picky as to the RAM type and speeds.
4) Tried it with plain-vanilla components (simple PCI vid card, single hard drive, etc)
5) Did "Out-Of-Box" setup on a piece of styrofoam to eliminate all case issues.
6) Turned off all OC - ran it all at base speeds
No matter what I tried, the results have been the same. Normally, I can deal with plugging it in before I use it, but when it becomes a pain in the posterior is when I am installing a game or system update that requires multiple reboots - and it gets stuck in the middle!
I was going to update the BIOS, but I heard some horror stories that the BIOS updates made matters worse. Nice....
So, if anyone out there has any ideas or can point me in the right direction, I would greatly appreciate it.
Thanks in advance for your help!