The other night my mac pro 1,1 froze watching Netflix. I couldn't kill anything, had to hard shut down. When starting back up, everything was working like normal, chime, gray screen, apple, progress wheel, blue screen for a couple seconds, and bang back to a grey screen where, for some reason, the mouse still works but nothing else ever happens. Left it for an entire night the first night, when I woke up the next day still like that. Order of events to fix problem: 1. Reset PRAM. Reset Logic Board. 2. Enter AHT, won't enter goes to same grey screen mouse works but nothing else. 3. Enter Safe Boot, enters safe boot fine. 4. Boot from Snow Leopard disc, also goes to same grey screen where mouse still works. 5. Completely wipe and reinstall Snow Leopard using my MBP with the MP in target disc mode. Reboot after it is finished installing and goes through same process as before and ends up at the same grey screen where the mouse still works. It still boots fine into safe mode for whatever reason, but I don't want to run in safe mode. Only reason I am wondering if it is the video card is because a couple years ago (at the end of my applecare thankfully) I was having problems somewhat similar to this and they replaced my video card and everything was working great again. I believe the card is an Nvidia, the card that doesn't have a fan. I looked at the graphic card and the capacitors seemed fine, they didn't look bloated or anything, but the "genius" at apple tried to show it to me last time and I couldn't tell then either. Is there anything I can do in safe mode to diagnose this further. I'd gladly buy the radeon 5770 if I knew it would fix it, but I'd like to be sure before I sink $250 only to find out the logic board is dead. Thanks for the help!