amp I bought 3 days ago not powering on - electrical engineer advice wanted

Suspect that the A308 is not performing (when you get it to work) at it's best. Amps can go bad explosively. Using it as is, would be risky to the rest of your equipment, IMHO. Doubt the tech will suggest that it is viable for action without his recommendations. 

For your information, the A308 could be used as a preamp only. Not sure of it's internal design, but if the preamp is separated at the board level, then there would be far less to go wrong if the amplifier section was left idle. 

@parkergetdean ,

Všetko len v dobrej zábave, môj priateľ!

Ospravedlňujem sa, ak som to prehnal.

You didn’t @thecarpathian you have a sense of humor which is more seldom here than good tech advice

@parkergetdean I am readjusting the timeline based on your description. 
 

Tvoj zosilňovač bude opravený, až keď bude AOC prezidentkou

@audphile1 ,

The old codger looking at it will be dust by then...😀

Actually, we'll all be dust by then!