My F and P Smartdrive 015 (12 years old?) suddenly decided not to even display any lights. Have been away for a while and then ran a couple of loads when I returned all ok , then nuffin! Yes, I’ve checked the power into the motor control box and all ok. Had a look inside the box and there appears to be some ‘deposit’ around the tube that runs the length of the box. What is this tube as a matter of interest? – looks like a fluoro tube! Maybe have to replace the box but thought it might be something simple which I would have the greatest of fun fixing 😉