Rynacblack:
I couldn't get a voltage meter, but I did get a new power supply to try.
That did not cure the problem.
ElDiabloConCaca:
The PMU reset did not cure the problem.
Thanks for both replys.
This just might be the end for this machine.
I posted this over at the Hardware forum, but there wasn't
much of a response.
I just ran a software update & the machine had a kernel panic (screen of death). I pushed the power button to shut down, waited a couple minutes then pushed the power button to re-start, but the power light...