Chuck said GRI but mis-typed it. It should be GFI which stands for Ground Fault Interrupter. There are two kinds of circuit breakers on most of our coaches.... a standard circuit breaker and a circuit breaker with a GFI also included. The GFI circuit breakers will have a white button included in the circuit breaker package, and you must also reset the GFI button. The GFI type breaker is there to give you additional shock protection and on most recent years of coach, many power fed to sockets in walls or cabinets are on GFI circuit breakers to help prevent shock to users of equipment plugged into those sockets, so you must press the white button to reset the GFI which is what is most likely knocking out your power to all those other outlets.
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5FI