Wade, since you haven't responded to the previous questions yet, I'll tell you my story. First, I'm not sure if you have the top of the line Holiday Rambler or not. So, my remedy may not work for you.
We have 4 slides, 3 hydraulic and 1 electric. I had a problem with the hydraulic slides not moving including the generator tray (hydraulic). Come to find out, there is a computer board under the belly at the top of our front storage bay. I had to unscrew the bay ceiling panel to find it.
Apparently, the vibrations from going down the road caused some of the connectors to 'lose-touch' with the control board (has happened twice).
And to top it off, there is no mention of this computer board in any of our manuals.
MM.
Mr.Mark
2021.5 Pleasure Way Plateau FL Class-B on the Sprinter Chassis
2018 Mini Cooper Hardtop Coupe, 2 dr., 6-speed manual
(SOLD) 2015 Prevost Liberty Coach, 45 ft, 500 hp Volvo
(SOLD) 2008 Monaco Dynasty, 42 ft, 425 hp Cummins