Can anyone help? As of today, my G4 powerbook keeps going to sleep, often every few seconds (i.e. as soon as it happens, I'll press a key to reactivate it, it'll come back on for a few seconds and then go right back off again; this is happening about 20 to 30 times in a row). Other times, it'll happen every minute or so. It's happening periodically (as I type this, for example, the problem's not happening). It's definitely the whole machine that's going to sleep and not just the display, as there's that usual 'whirring' noise of the machine starting up again. I've checked my energy saver settings in System prefs, and both Power Adapter and Battery settings are set to never put the computer to sleep, and 'put hard disk(s) to sleep when possible' is unchecked. I've also tried restarting the machine, and it still happened. I'm running a G4 Powerbook on OSX 10.4. Any help appreciated. Thanks.