Re: Alienware x51 just shows a black screen
Try a different monitor, it may not be an issue with your x51 after you tried the things you mentioned above. If you cant try a different monitor at least try to switch the monitors channels, hdmi, dvi etc
And try to unplug the monitor, leave it unplugged for a couple of seconds. Start it up again and see what happens.
If none of the above work call AW tech support...
My Alienware x51 - Core i7 2600, EVGA GTX 660Ti, 8GB RAM, Crucial m4 256GB SSD (replaces HDD for better cooling)