I have this board, has worked fine for yonks - no BSOD, kernel panics, weird fits. I upgraded the BIOS to F8K so that I could use a Phenom II CPU. Then cleared CMOS and switch on, all works. But next day, I switch on and there is nothing apart from a sound which sounds like the DVD drive seeking. No beeps, no LEDs light up, no display. So I cleared CMOS again, and it boots okay. But next day ... same problem - no workee until I clear CMOS. I changed the lithium battery, but that helps not. I checked the battery that I removed, and it is okay. I disconnected all drives, and that made no difference. There are no PCI cards, and I am using the onboard VGA. No speakers or ethernet are connected. No USB devices apart from keyboard and mouse.
BTW I have not fitted the Phenom II yet - it still has the old Phenom Agena CPU.