I've got a machine with a DQ965GF motherboard. Two days ago it started locking up hard. Ran memtest 3.3, 1.7, and TestMem 4. TestMem just freezes, memtest failed on moving 8 bit inversions. Letting memtest run eventually causes the system to restart.
I pulled memory sticks one by one, and then replaced the memory with a couple of known good sticks. No luck. I switched power supplies, didn't help. Swapped video cards just to be safe. No help.
When I start the machine I get a single beep before it POSTs. According to the manual, a single beep means:
1 beep - Refresh Error (with nothing on the screen and it is not a video problem)
I'm assuming that the motherboard has failed since it's obviously not a RAM or power issue. Do you agree?
NOTE: I also tried resetting BIOS defaults, and even flashed the BIOS to the latest version. I also ran the Mersenne Prime Test and the CPU seems to click along just fine.
(Tried logging in to superuser with openid but it's not working for me today. Hope this gets through)