17" Powerbook G4 1.67 GHZ - Will not turn on after power surge !!!

This is showing no signs of life after a power surge. Here is what I have done so far:
AC Adapter - Test OK
DC IN Board - Test OK
PRAM Battery - Test OK
There is power getting to the logic board, but absolutely NO response when you press the power button. I have tried the oh so famous PMU reset and zero response. The AC adapter glows amber, and no chimes or beeps. Has anyone had the same experience or could steer me in the right direction. I am very fearful it is the logic board, any sugestions?

You might want to take it to a repair shop. Something similar happened to me, but the repair shop took care of it in a few days. (The only things I lost were all the apple loops in GarageBand, but that's fixed too.)

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