PowerBook G4 Sleep Mode issue

[Set-roc]

I'm having a problem with my PowerBook G4 where is goes into sleep mode at random times. Mostly when I am streaming video.... or at times the fan comes on, it sounds super high then boom..... sleep mode again. After hitting the space bar, it comes back on, but it'll happen again shortly after. I've played with the sleep settings and nothing has helped...... anyone have any ideas??

[djackmac]

Try resetting the PMU. Its a different process depending on which model powerbook you have. Usually involves disconnecting AC power and removing the battery then holding the power button for 5 seconds. Then putting the battery back in and turning it on again. But yours may be different.