You are of course correct, Guy. I was assuming that already. We managed to get a spare MX8000 IR board. Let's see whether that works. I am still suprised that the MX4200 board did nothing since to the best of my awareness, MX4200 und MX8000 are closely related. Hopefully there's not something else that is preventing the television from working. It was running when I collected it from the previous owner. Still you never know.

Greetings