A co-worker of mine told me his HP PC was freezing up on him and the screen was all crazy colors. He took a pic and it seemed like the video card was going out. Its built in the mb. He bought one at best buy and that problem was fixed but the PC still froze up. He brought it to me and it wouldn't even boot with out freezing. So I took the hard drive out and tested in my PC. Sea tools said the hard drive was no good. He bought a new hard drive installed windows and the PC still freezes he says. Can't install drivers before it freezes. Once he said the whole screen just went black. So what else can it be?