Quote Originally Posted by Dostoyevsky77 View Post
My PSU fried a couple days ago. I put in a replacement (Tt 1200w), and now I have a problem:

I can only POST at BIOS defaults. If I change ANYthing in BIOS that requires a cold restart (any OC change), the system will shutdown immediately after restart (it only comes on for a fraction of a second). HOWEVER, if I change anything in BIOS that doesn't require the cold restart (like changing the boot priorities), it's fine.

The only way to POST after it's failed the cold restart is to reset CMOS (at this point, the POSTer still reads, "EN SETUP"). This works 100% of the time and it will even load the OS with no problems at BIOS defaults.

I've re-flashed and even tried flashing back to Maximus BIOS, but I still have this problem. I've swapped out RAM and the video card, which has no difference.

Could it be a PSU problem? Or is my board fried? Kudos to anyone who can help me diagnose this.
This was caused by the processor. Some of you may remember that I got a new board and continued to have the problem. It APPEARED as though all I had to do was hold the power switch for five seconds to restart after a failed BIOS restart. Despite 8 hours stable, other instabilities became evident. I got a new E8400, and that seems to have returned everything to normal.

Just an FYI in case someone else has the same problem and suspects the board.