Long story short: 2013 264FSC/FSX with almost every option including the Fusion ip600 radio with 2 remotes and wet sounds amp. About a month ago, the radio would sometimes come on and sometimes not. It would also come on by itself after turning off. 2 weeks ago, no radio but you could hear the amp click on and interference noise would come through the speakers.
This past weekend I did some internet research and found several other stories of dead Fusion radios. I tried the reset button, I disconnected the power harness for several extended periods, I have power at the breaker, and I have power at the harness connection. The head unit is dead.
I just received an email back from Fusion tech support and, as I feared, the WR610 remotes are no longer compatible with current Fusion networking.
Bottom line: I'm out a head unit, 2 remotes, and all the radio network wiring that will need to be re-run. I didn't expect a high end radio and all it's components would end up in the trash after 4 seasons of use.
I'm in no way bashing Monterey, I love my boat, the people behind it, and everything they've done for me. Fusion I'm not so happy about.