Not sure if this is relevant to this model, but I’ve had Beko machines in the past where the timer would only respond if it was set on the same programme as when the machine shut down. It was a question of selecting each programme in turn and trying a start or reset. If the correct programme was selected all came back to life again and control restored. It may be worth a try. (I’m sure I got the tip from this forum – a good few years back. Might be worth a search.)
Graham