My iMacG5 has been turning itself off without warning. It's as if someone just pulled the plug out of the wall. Four months ago I replaced the power supply, and the problem was solved -- until this week.
It started turning itself off again -- several times a day.
Is it really the power supply? Could it be something else? Is something else killing the power supply?
I've searched the web and the problem seems to occur often. But I've found no solutions. I've addressed power spikes & power dips, 3prong plugs & sockets vs. 2prongs. The computer is kept cool with external fans, and never gets very hot at all. So I don't think it's overheating.
Any ideas on what can be causing it and what can be done about it?