The issue is I have just bought a gigabyte p55m-ud2 motherboard. It was fine to start with I could boot into the CMOS. However after changing the RAID setting under>Standard CMOS Features> Peripheral Devices it no longer displays anything when I start it up. Everything runs, all the fans go, all the indicator leds are on but nothing on the screen. And I checked the monitor to make sure it was working. Any help is much appreciated.
More about :changing raid settings cmos screen output
Use the cmos jumper to reset the bios. Unplug the power supply and move the jumper over one position so that 2 out of 3 pins remain covered, then return to it's original position after one minute. Or remove the board battery.