1: True story includes suspect and fix.
Neighbor came over to fetch me for his next door, Seems they had used space heaters the night before and now a lot of outlets including the TV in his case did not work. As we retuened to his motor home I ask about an inverter.. He did not know if he had one (he does) Got him to open the proper compartment door and reset the tripped breaker. Ask him to go in and check if everythign worked (it did) His wife ask if I thought I could help, He repolied "He's already fixed it". as the TV came on.
And that is the first suspect, a 2nd breaker on an inverter or on a sub panel (My rig has the sub panel).
Second, The QUICK BOX outlets are kind of cheesy. I mean the wire is PUNCHED DOWN into a slot that cuts through the insulation and makes contact with the wire inside.. This is common practice in Telephone junction boxes and works very well there at a few mA. but when you start drawing double digits (Vacuums can do that) bad things happen..
YOu may have burned out a connection, and what's worse it may be "Up-line" from the failed outelts.
Home is where I park it!