Yeah, its probably the video card or motherboard. Try switching around the parts to, err... switch them around, then see if your monitor works with the other video card or motherboard. Please try...

Do you mean just moving the screen around? On the bottom of most monitors, there are a few buttons. One of the buttons brings up this wierd looking menu, which is where you want to be. Navigate...

It really shouldnt damage the screen, but ive heard that some games need better monitors. But you have just bought a new tv so i guess its okay. Actually, now that i think about it, you should...

I think that when you bumpped it something probably got reset, I think, so that's why its so dark and everything. If you open the monitors menu by pushing a button on the monitor you should probably...