I have about 3 or so F16V3 that I am not using at the moment, happy to have a look at yours if you like and see what we can do.
I'm.in Toowoomba though
So can you connect to that FPP at all? I had the same thing with an F16V5 last week, been running for 4 months perfectly, put it out to run the show and it would not work with any pi's, would not work on lan or direct wifi. I did a full reset and set it up exactly the same and away it went.