Where are isolation transformers on Hunter 405 Legend (1997)

[Rothblum]

I have a 1997 Hunter 405 Legend that I bought about 2 1/2 years ago. The shore power system was working more or less OK up to a couple of months ago. My shore power suddenly and mysteriously cut out when I was in my slip, and the plug on the boat side seemed to be more burned up than before. Now, when I am plugged in to shore power, I am getting nothing on Bus A (30A) on my switch/circuit breaker panel. I tried replacing the somewhat burned up input male shore power socket but that didn't do anything. I found a breaker for the "B" circuit (30A), right behind the inlet socket, but can't find a breaker or anything for the "A" input. There is a disconnect somewhere between the shore power inlet socket for the "A" circuit and the breaker/switch panel at the nav station below. Does anyone who owns a Hunter have a suggestion where to look for the missing breaker or isolation transformers? Is there anything else that could cause a disconnect between the shore power inlet sockets and the bus at the breaker/switch panel? Yes, a circuit breaker, but where? I think a previous owner may have eliminated a breaker, but maybe not the isolation transformer. If anyone out there is familiar with the Hunter, maybe you could give me a clue.