Sorry to hear that. Were the corners going up unevenly? or down unevenly?. That would indicate you have a broken part or wire to one corner. the lifting wire runs from the crank wire to a splitter where the four wires go out to the corners to lift in most units. Not sure about yours. Go under and see if any of the visible wires are broken, sagging, etc.
Use the search bar above to find some others who have encountered this problem. Also search some youtubes for pop up trailer lifter failure repairs.
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