I go to football practice, the air conditioner is on, my powermac is converting video. I get back, it wakes from sleep mode, and the display is pink. I restart it, still pink. Five seconds into this post it turned back to normal. The graphics card is an NVIDIA GeForce 6600. It is a PCIe powermac G5 dual 2.3 GHz. The graphics card has only a heatsink and no fan, so my first guess was that something fried. Any ideas?