I wanted to provide an update in case anyone else comes across this same issue. When the slide would not come in, I tried to extend it again and then tried to retract again. This was suggested on youtube. Anyway, I think that originally my slide would not move because I didn't have enough battery power. But with me moving it in and out a few times it ended up overextending, supposedly due to the controller going out. Once it was over-extended, it bent a track that one roller rides on and it couldn't get back over the track. Once the controller was replaced, the entire slide had to be jacked up to get it moving in. So, it works now but I've got a bent roller track right where the living room and bunkhouse meet. This should not be a problem as long as the slide doesn't over-extend again.
If you are having issues with your slide I would recommend stop extending and retracting and check your main battery voltage. The higher the better, preferably over 13 volts. Also, it could help to put your coach in high idle. This is done during idle by turning cruise on, and then pressing the set button. The engine rpms will increase.
Hope this helps someone. Cheers!!