Technics SUV4X new class A Amp - 20 odd years old...

Question

Amp gone into "safety operation" mode - flashing amber light+no output.
Amp is connected to 1pr. 8ohm KEFS + 1pr. 8ohm CELESTIONS(correct impedance selected on amp). I had it on 3 of 10 ( loud amp - 65wpc ) and the output suddenly stopped and amp went to above mode. i switched it off and noticed the transformer was hot - although well ventilated. ive taken cover off and checked the 2 fuses i could see ( both ok ) + can see no toasted components.Do you think ive cooked the transformer or possibly the output IC?. As the unit will power up i dont think the Transf. is the problem - hopefully it could be other components that are standard service items - cheaper ones??!. Thank you if you can help me. A fellow Biker !!!!!!.