Ok my friend is hjaving problems with his comp. Whenm he turns it on it says check signal...so he went to his tower and made sure everything was plugged in correctly and it all was....and nothing was loose.....so he restarted it and the same message came up: check signal. So then he hought well it might be the monitor...so he went and got his sisters monitor and the same thing happened. Do you guys think it's the video card??...that's what im thinkin.