BSSG

Many thanks, desk is running perfectly again, with the circuit diagram we were able to detect exactly the error, it was one path defective which we replaced by a wire.

Thanks, I will check the diodes. Any chance to get the circuit diagram? Would be very helpful.

I´m working now for a long time with my Sirius 250, but last week I switched it on and three buttons were not working anymore: Focus submaster buttons 2 and 10 and brightness submaster button 8. I changed every single IC on the related circuit board, but problem remains. They just do nothing, LED will also not light up. Switches are working electrically. Anyone with a good idea?