Monitor not displaying anything

Ok, so anout 2 weeks ago i was playing a game on my computer and accidentally knocked it over. It was on the ground and i hit it and it fell flat on its side. So i figured nothing went wrong, picked it up and started it, fans were doing a strange pattern, faster and then slower, continuously without stopping. And then my monitor went from the green light to the amber/orange light.

A day or two later, i switched out my video card and hard drive with another computer, and they worked. Then i switched my power supply and anything else i had and they worked. However, when i switch either the CPU, or the mother board from the computer i knocked over with another one its didnt work, but when i put another mother board, and CPU it still didnt work?!?!?! And the monitor and all the cables work cause i switched those to. SO im a little frustrated, PLEASE HELP!!!!

Crash
 
it is possible that when it fell over the motherboard flexed enough to touch the case. It may have shorted out the motherboard.
 
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