I have a similar not entirely unrelated issue relating to the optical link and the lighting function where the 333 & 332 respond to medium & low lighting but the 250 & 300 stay on high. As I prefer high it’s not been an issue so far but it’s annoying that I can’t resolve. Anyone else found this issue? Power on works fine.
My 332 & 250 also has a standby power problem. The 250 functions normally, but the operating system of the 332 tends to get hung when in standby power. It functioned properly for about 9 months after I got it, but I now use it without standby power. I leave the 332 and 250 on all the time. When it gets frozen on standby, the buttons and remote don’t work. The remedy is to cut power completely and then re-start. My dealer came for a look and had no solution. They were going on ask Naim for ideas, but I have not heard any reply.