After Dennis passed over yesterday our power went out for a short time...well when the power came back on all my Macs booted except for my G5. It kept showing me the screen with "?" mark folder. Normally just reinstalling the OS will cure this, zapping the PRAM, and repairing the disk but not in this case. After trying to reinstall the OS a few times in upgrade form and archives form I got tired and just formated and installed again..but again the same result. If the OSX CD is not in the drive it will just go to the old ? mark folder again. I even did a Zero Format and install with the same results. So after all that Apple told me to bring it in as it's probably a HD failure or Logic board failure. Thank goodness my Applecare still works. What I find odd is that all my Mac's are on surge protectors and run off the same wall of outlets...so why just the G5?? Act of God? or just dumb luck?