Hi. My G4 DT is stuck at the gray screen with a ? blinking inside an disk icon. Obviously, it can't seem to find its startup system. It's been like this since I stepped on a power switch lying under the table and turned off the computer while I was working with i-tunes. To be more accurate, I got my i-pod conneced to my Mac when it happened. This is not the first time my mac's lost a system but it came to life before but don't remember how I did it. I heard it's common for this to happen so mayb is there a good way to fix this? I'd appreciate any suggestion. Thanks alot.