How I can stop my Goodmans GB3 box reverting back to set up mode?
My Goodmans GB3 set top box after I have set the timer it often fails to come on and the tuning menu appears and asks for the box to be set-up again from scratch!
Assuming that you are not unplugging it or switching it off from the mains, I'd chuck and buy a new one. Budget boxes are not really designed for repair.