Bryston 4B Power Amp Solving the blinky light problem

Customer swears that the blinking light is bad and power light should be on constantly. Brings me another amp that one light is on and the other blinking. Got to the root cause, now both blink when music like they should, steady when silent and should turn red when clipping (I didn't find that out as my speakers would end up in orbit if I let this thing loose)
Now have to convince owner that I am right and he is WRONG.