A couple days ago we pulled our camper out from yard area after not using it for 4 years. Had no problems raising roof. Left it open for a couple days, listed it for sale and when I let the buyer crank it down to close so he could see the roof, It cranked down fine. I don't believe I put the safety lock back onto the lower crank or the hook. The next day I went to crank it back up, it was really hard only raised up about 4". After trying to lube the cables and the bar that goes into the cover still didn't allow us to crank it up. We took off the cover for the whiffle tree and it will only go forward a little bit and stop. There is also a loud pop sound if you crank it a couple times. I told the buyer of the problem, but they are a single parent and giving them a great deal and would love to be able to still be able to sell to them, but we won't sell something that doesn't work. The cables seem to run underneath the popup and not through the cabin like most other posts I looked at. it doesn't seem that a cable is broken, but not sure if one could have jumped off the reel? All of the cables are still connected. Any ideas or troubleshooting ideas would be appreciated. Thanks.