Parasound Hca-1205a stays in standby

i have one in my shop. all 5 amps have 50v to each fuse.so supply is good.i disconnected the input and power supply to all the amps and still stays in standby. the relays on the control board both click when i power the amp on.theres no dc offset on any of the 5 outputs.any help with where to look would be great. thanks
 
Maybe you can check all the parts transistor, zener diode cap and resistors in this control circuit red area
 

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