I know this has been discussed before. When I first upgraded to Mac OSX 10.4, this G4-1GHz-AGP would sleep and awake. It now sleeps okay but goes into a hard coma and the only way to wake it is to push the RESTART button on the front. Yes, I have a Belkin internal PCI card to get more USB ports. Does Belkin or Apple have a fix for the sleep = coma problem? I need the extra ports more than sleep so I have just learned to never let it sleep. Dick