Hi ! Welcome to IRV2! We're sure glad you joined the gang!
Does your coach storage bay doors open upward? If so, they probably have interlock switches that prevent the slideouts from operating with a door open. Even though the door may be closed, the switch could be defective or just need adjustment. You can bypass the switches one at a time, trying the slideout after each one.
Good luck, happy trails, and God bless!
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD