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Does the rest of the receiver work? Do you get audio output? If not, it could be the main power transformer. There is a thermal fuse buried in the core that if this opens, it will cause the unit to not power up completely.
I went through the amp/receiver and used small star washers on all the grounding screws I could find including the one securing the transformer, cleaned dust off all circuit boards, checked output transistors and fuses, all OK.
Re Assembled unit and it worked OK.
I will buy a fan and fan it to avoid sourcing heatsinks for the previusly suggested IC's.
Thanks for the technical help, sure solved my problem.