Re: Philips N4450
I'm puzzled too.
Just about the only thing that should stop the capstan motor is selecting 'Amp' mode. I could believe a bad contact on the switch (they are notorious for this!) but that doesn't explain why 'Stop' got the motor running.
I assume all the power voltages are present and correct.
Other than that I think I would check the gating diodes on the mechanism control base board.
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