Sorry I don't have any answers for you.
However I was wondering if my problem was relative to the same one you are having.
2002 Monaco Dynasty. 3 slides, all of a sudden none of the slides will work. No noise, no motor humming absolutely silent and no movement.
Is there a fuse possibly that might have blown that runs the motors? I'm thinking it's hydraulic but not sure.
I also just seen your post was on 4/2011 so I'm sure you have resolved your problem by now.