My guess is that all of the breakers and switches are fine.
If the coach batteries are dead, the Use/Store switch won't click. If they are completely exhausted, some of the newer battery chargers won't charge them. The work around is to connect a working battery to them + to + and - to -, and let some power bleed across. Once that is done, try the charger again.
I have an old relic battery charger with a trickle feature. For a dead battery, I let it trickle for a few hours, then switch to charge.
Or, you could just shake it off and buy new batteries, since you are in a hurry. Consider it part of the cost of your education!
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