So I was playing a game the other day and all of the sudden the screen just died. At first I assumed it was the monitor, but the power light comes on fine when I start it up again. After doing a bit of reading, I think it is the GPU that died. I don't currently have another monitor to test it out on, but the computer itself boots up fine, the monitor just doesn't display anything. I have disconnected and reconnected all the cables and everything but it still doesn't work. I don't honestly feel like lugging this thing to a shop so they can tell me something I already know or could find out for free. Is it likely the GPU? Where would I get a replacement, and for how much? I searched on OWC and they had no video cards listed for this generation of computer, and I'm honestly not even sure what kind of card was in it before.