IF the GFCIs will not reset, this suggests to me a serious lack of 120vac.
They need power to reset, won't reset without it.
Possible causes.. Tripped breaker, Tripped breaker Triped breaker Tripped breaker
If you are on shore power.. The one on the pedestal.
If on Generator: one of the breakers on the breaker
NOTE These are given in "line order"
Next is the main breaker in your RV
next is the branch feeding an inverter if you have one -or-
The branch feeding that which is not working
Next, IF YOU HAVE AN INVERTER, it may have one or more breakers on it often hidden around in the rear where you can not see them.
And a Sub Panel branch if there are none on the inverter
Other suspects.
Transfer switch
Screw loose.
I am fond of saying Many RVers have a few screws loose.. (And I can prove it too). I am specifically speaking of the screws that attach the wires to the breakers and bus bars in your 120VAC power distribution panel.. One of mine took over 2 full turns before I felt resistance (DO Unplug an/or turn off generator before playing in that box).. Also the Marinco outlet on my main power cord (Well it was not mine) and the inlet on the MH (That one was mine)
These are all screws I have had to tighten. (See told you I could prove it).
Finally a bad connection or bad wire somewhere. (very low and even lower on the chart).
Had a bad connection in my inverter junction box though.
