[lakesidevu]

Here's one that baffles me regarding the electric panel.
We just returned from our ride yesterday and we hook up to shore power as usual with both line 1 and line 2.
All of the red indicator lights are on for the items that we turned the breakers on for.
I turn on the breaker for the head fan and all of the red indicator lights go out. I turn the head fan breaker off and the red indicator lights come back on .I tried this 3 times ,and now none of the red indicator lights come back on.
All of the items like fridge/A/C, head ,head fan ,Cabin lights ETC  are still functional and working but no red indicator lamps are on?
No fuses or circuit breakers were tripped
Is it the head fan breaker possibly causing this ,seeing that's what I replace to start with?
any suggestion or ideas would be greatly appreciated.