all my components turn on but not the amplifier?

everything was working fine then went to turn on unit and all came on except the amp which means no sound or power to anything else. unplugged all and hooked back but still nothing. the type of system is a Technics and the amp serial # is SU-G95 or SU-G75 and the system is SC-3600/SC-S3650 or SC-S2600/SC-S2650 electronic comp. is SD-S936 or SD-S926. if nothing else then a number to Technics company to talk with them, thanks