Quicksilver dual 1GHz 2002 powers off for no reason.

My Quicksilver dual 1GHz 2002 powers off for no reason. Could it be because of overheating? I can run it for an hour or 2 and then it simply powers off as if the electricity went off. No warning, no process. I can wait 30 min and power it up for maybe 10 min and the same thing. Does anyone know what may be causing this? There are some logic bd problems too. It will not shut down. I must hold the power button down until it goes off, and to start it up, I must unplug it f power then replug it into the wall to start it up. Yes it is time for a new one, but this one would be nice as a 2nd Mac.

Hello! Look in apps>utilities>console and see if it's throwing a crash log that might narrow down the problem. It could be a weak power supply that's failing when it gets warmed up or a fan that has quit. Tom

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