Hi, i just got a computer from a friend, he didn't wan't it anymore. I dont know so much of the computer, the problem is that i don't recieve any signal to the screen? i changed the graphic card to some other but it didn't solve my problem? Anyone who has an idee what to do? It's an abit NF7 Motherboard and a Geforce 6200 AGP 256 MB graphic card... the computer cpu is about 2ghz. The video card is baught for 6 months ago and last he tried the computer it worked with no problem.