PSW 650 won't auto shut off

Replaced a fried amp transitor and caps, working again. But will not shut off when in auto mode now. Turns on with receiver, but stays on after shutting off receiver. Switching the power switch to off and back to auto it will come on still. Have to unplug to reset. Does anyone have the schematics or know why this is happening. I contacted Polk and they don't have the schematics anymore. Any help would be appreciated.

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