MacBook Pro boots to grey screen
I consider myself a pretty advanced troubleshooter but this one stumps me. Here is a summary of most of what I have tried so far, not necessarily in this order:
Reset NVRAM
Reset PMU
Attempted to boot to DVD Command + C
Attempted to boot to Target-mode Command + T
Attempted to selected startup disc manually Command + Option
Attempted to boot to SUM Command + S
Attempted to re-image firmware using CD
Attempted to boot diagnostic CD Command + D
NONE of these work. I have fixed many Macs in my day and have not encountered an issue like this!
MacBook Pro, PowerMac G4, Macmini, iBook G3, Mac OS X (10.5.1)