Hi, Thanks in advance for any insight. Basically I have G4 500 MHz with 1.2 gb of RAM running OS X 10.26. On startup I reach the grey screen and it gives me a prompt to restart my computer and kernel error says: FF:FF:FF:FF:FF:FF:FF Sometimes the grey screen freezes with white noise streaked across the screen horizontally. Any thoughts? Could it be a bad video card? Bad RAM? I reinstalled the OS X two times already. I can't find anything on apple's tech support page. Argh... Thanks!