Matt,
I have 4 machines with this problem, had a fifth, but it was repaired by replacing the power supply module. I suspect heat is part of the problem, as all of the failed units I have are 200 or 240 mHz machines. A PMU reset is accomplished by removing all power AC and battery (excepting the PRAM battery) and holding the reset button in for at least 30 seconds, this is per the users manual. If this is not effective for more than on restart, try replacing the power supply, if this is ineffective than the logic board has a problem, probably the PMU chip or a secondary controller, have been unable to get the component parts to confirm this.
Roger
Anyone have any idea which component on a power board is failure prone ?
Mad Dog
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