I have a 20 amp circuit in my garage that no longer functions. It has 3 two lamp florescent lamps, and 110v outlets. The only full time load is a refrigerator and an upright freezer.
When any load is applied the power goes away and it tests as hot/ground reverse. If the power comes back it tests as o.k.
I have replaced the breaker, disconnected the lights and plugged the appliances to another outlet but power is sporadic and temporary at best.