Waking from sleep problem


I have gone back through earlier threads to try and resolve this problem and found some useful suggestions, but none work.

If I set my G4 (800 Mhz 768 MB RAM 10.3.9) to require a password to wake it up from sleep, the damn thing won't wake up. All I get is a blank screen, so I have to reboot.

The G4 wakes up very happily if I have not set it to require a password to wake from sleep.

Anyone know what I can do (besides running Disc Utility, DiskWarrior, unclicking 'put the computer to sleep at all times" button in System prefs).