Long story short, I got stuck with a 17" Macbook Pro from 2006 that is the Non-Unibody model (Penryn) I was told by the previous owner that the screen was purely black and wouldn't turn on. I had them wipe the entire drive and such and ship to me. I got it, and as soon as I turned it on, everything seemed fine: The screen lit up, Apple Logo, Recovery Installation and such, la la la.. ok After using it for about 4 minutes or so, the screen did turn black, and it never came back on. I don't typically work on these models, but am wondering if anybody can give any opinion on if it's the GPU or some kind of screen connection. I know that these models had issues somewhere where the screen would only work if tilted at a certain angle due to the connectors in the hinge, but this screen won't work at any angle. (honestly not sure what caused it to work when I first got it since it hasn't worked since.) What leads me to believe it's a GPU issue is that I can't get it to run on an external monitor while using a DVI to HDMI adapter. I did put it into Target Disk Mode and install a copy of Lion onto it (latest OS that runs on it I believe?) since I know that the recovery partition won't run on an external monitor since it doesn't have the drives to access the port, but doesn't seem to run externally on the OS, either, so. Any other troubleshooting options out there? I think I've gone to the wall as far as non-repairs and disassembling goes, but doesn't hurt to get some more insight from those in the better know. Thanks!