Re: bosch sgs45e08gb/45
If it works when you thump it then that must mean there’s something loose or broken and if that is, as P45 says, the pcb then it might be caused by door slamming. Now, let’s suppose it’s a tiny invisible crack somewhere (I’ve had this when repairing audio equipment), you may find it can be overcome by stuffing something non-conductive in the pcb box to put it under a just a leetle bit of tension. Bit of trial and error involved but you could charge for that if successful. Better than landfill if the customer won’t stretch.
Mike.