I recently got the original Cinema Display, ADC version, and it was working great. Used it on a G4 Cube earlier in the day and all was fine. Turned the system off and walked by it later in the day and saw the power button was flashing sporadically. No pattern too it. Try to turn the Cube on and nothing. The light stays on and studders even if the computer is on or not. I tried my 15" LCD Studio Display with ADC and my 17" CRT Studio Display with ADC and both work fine on that. Any suggestions? I'm waiting for a Power Mac G4 too come in and I'll try it on there too but I have nothing else with ADC to try it with at the moment. Thanks for any help!