Speakercraft BB1265 - Repair Help - Audio Sense not working

The audio sense to turn on the amp doesnt work. When I turn off the audio sense and just use the power switch the amplifier works 100%.

Does anyone have any ideas? I am going through the board testing individual components but cant seem find to anything that is showing bad.

That said - Does anyone have the schematic for the Speakercraft bb1265 (or applicable one)?

thank you!