[firewalk]

These are the things I've done when this happened to me:

Removed/replaced video card

Removed/replaced memory. If I only had one stick, I changed the slot I put it in.

Lastly, I cleared the bios (CMOS) and put all the settings back in.

Each worked on different boards for me. Good luck!

[firewalk]

One more thing to check, thermal grease on chip between fan? May have to scrape off old stuff and put on new.