Sorry, my specs are:
CPU: Intel i7 950
Motherboard: ASUS P6T (not deluxe, just P6T)
PSU: Corsair CMPSU-750TX 750W
RAM: Kingston 3 x 2 GB DDR3 1333 Triple Channel
Graphics Card: XFX HD-585X-ZAFC Radeon HD 5850
Case: Cooler Master Storm Scout
My problem is currently as follows:
When I woke up yesterday I found my PC powered on, but not functioning aside from the LEDs and the fans spinning as fast as they could.
I power cycled it and it booted. I dismissed the problem for the time being.
This morning, after leaving the computer running all night I found that the PC was in the same state as before, but power cycling it did nothing to fix the situation. It gave no POST beep code and went straight to all the fans spinning 100%.
As mentioned in the OP, this problem went away after pulling the CMOS battery and waiting 30 seconds before replacing it.
I checked the event viewer and there are no Critical or Error messages, with the only message being about a clock desync, which is explained by the battery pull.
I feel it is safe to assume that this problem is a hardware one, with the only other possible explanation being an issue with my BIOS settings, which I am inclined to doubt as the settings are more or less default.
How can I further diagnose this issue? My main suspects are the PSU, motherboard, and cpu, but I am limited in my ability to test the latter two.
Thanks for the read and the anticipated help!