Sounds like the work on the slide has not been done per the book??
Do you have the big info case which should go with each RV and has the HWH info in a seperate booklet?
My hope would be that the book would have more info than the standard user's manual that Winnebago provides online.
I did a check of that manual here and it referrs to the HWH manual:
https://www.winnebago.com/Files/File...Adventurer.pdf
Down about section 2-21 there seems to be info on how to do it manually but it sounds like the operation has gone one step too far and tried to close without disconnecting the hydraulics? But at this point, if the hydraulics are disconnected and the manual is broken, I would expect to be able to "muscle" the slide back in but the hydraulics do have to be shut down first.
Do you have the book from HWH and tried there for info?
Have you looked for that manual online as it has to have specific info on how to find and open the correct solenoids?
Sorry, never muscled one in, nor torn one down to know how to get in to do that!