iMac G5 random hibernation

[cminor99]

I recently bought a refurb iMac G5 with Os 10.4.11 - It has worked fine and now all of a sudden it will randomly go black as if hibernating and takes a few moments to come back on. It doesn't do it often, usually when I'm playing a video clip on the web for some reason, but not always.

(This is a desktop so obviously its plugged into the wall)
I haven't made any changes to the PC, but the OS has all its updates. Any help greatly appreciated!

- Catherine

 

[nakile]

Open System Preferences and go to Energy Saver. Check to see what the display sleep time is set to under the "Sleep" tab.

 

[cminor99]

not the power settings

Thanks, but I know computers enough to not be a complete idiot. It's power saver settings are all turned off.

It will turn off, turn back on and then go off a second later, it happens very randomly, usually just when I turn on a net video, and I'm still working.