elec jack wont work, manual overide wont budge?

[Randjg1]

Ive had issues with jack before. Had him fixed. Now first time to use after a winter of non use and nothing. Light goes on so i believe its getting power. Plugged shore power in and light go a bit brighter but still nothing. Took off cover and made sure wires were tight. Its not wet. Anyway resorted to socket to turn the square manual piece and It doesnt budge in either direction? whats up with that? Rusted? locked up? went to try bigger tire socket wrench but didnt have the right adapter. Worker fine before. I need to move this tomorrow up to the dealer who can take it from there. I need help so i can overide this baby in the morning. Any ideas? Bless you.