KG,
Believe the part you are actually seeking is the power supply board, the PMU
is actually a chip on the logic board. I have 3 machines with a similar problem
and used the same troubleshooting mechanism you did, without resolution. The
first machine I fixed, I did so by replacing the Power supply Board, the other 3
were no joy (the procedure we're using is also the same as recommended in the
Apple service manual).
Roger
KG wrote:
> I've just come across a 3400c with the sleeping sickness problem; it has
> problems starting up and sometimes waking up from sleep, and I am hoping
> that it's just the PMU board starting to go bad on it. I've tried a new PRAM
> battery, a new battery and another PSU without success.
>
> Does anyone know where to get a good deal on one of these boards? I've been
> trying to post to the swap list but it's doing its usual malfunctioning
> tonight. I'd like to get this 3400 working right again.
>
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