I tried everything. First I accidentally pressed CLR CMOS a week and a half ago and had to take it in to the geek squad. Then When I got it back it didn't show anything on my monitor or my Samsung 720p HDTV via HDMI. The keyboard is working - and the LED lights my computer show up - but no signal to the monitor. I have an ASrock z77 mobo, 2 Radeon 7950s (crossfire), an LG Flatron W2043T , a 1050 watt power supply, and an intel i5 3570k processor.