Hi Die Bogener,
Huge thanks for your help. I’d previously checked all connection terminals inside plugs and sockets associated with the incoming power supply to the system, and all were good. I guess because the problem started following that close lightning strike I’d convinced myself that some damage had been caused inside the BM5500. Whe the fuses inside the BM were good, that’s when my pessimism about the complexity of the problem set in, and I failed to spot that – if the LED’s had gone out – it had to be because there was no incoming power. After your helpful steer to the source of the problem, I went back and eventually discovered that an intermittent fault existed in the incoming mains lead from the wall socket – a mains cable that had been completely undisturbed for the past twelve years. I changed out that cable, and the whole system is now working perfectly again, just as before. I was so happy that I spent the whole of the rest of the evening listening to my favourite music!! Why that incoming mains cable developed such a fault remains a complete mystery … I’m going to pull it apart to satisfy my curiosity.
Again, my most grateful thanks for your help. Thank you.
