My Asus P5Q-Deluxe mobo will not boot after saving any changes bios till I reset cmos. All fans spinning but monitor blank.

After saving the changes by pressing f10, the PC will shut down for a few second then start up again. But upon start up, monitor no display, cpu+all fans spinning, keyboard no light.
I am able to change the bios settings and save the changes after reseting the cmos the 1st time round. But if I am to changes any settings after tat, the mobo will not POST.

When I press Ctrl-Alt-Del in booting up b4 loading into Windows the same problem will occur. Headache. What could be the problem? Already flashed to the latest official 0704 bios.

I don’t wish to clear cmos everytime I change and save a setting in bios.