Monitor problems - screen black.
I have a computer which was built especially for me, it has 1GB RAM, Windows XP, NVidia (I'm sorry I don't remember the model).
Last night I turned it off an it updated windows, I left it to do that and eventually heard it turn itself off.
This morning I turn on the computer, and it starts up and runs fine, except the screen is black and says "no signal." It did this a few weeks ago but after I turned it off it started up fine again. I doubt it's the cable as I tried another monitor I had, and got the same result.
I've checked and unplugged everything and put it back it, but nothing seems to affect it.
I don't know a lot about computers, so any suggestions would be grateful!!!