Here's the story.
I have a vintage Polaroid SX-70 I bought at Value Village about 15 years ago for $5.99* (as evidenced by the grease pencil still visible on the leather, because Minnie Pearl).
It worked perfectly for several years, but jammed about 11 or 12 years ago and I couldn’t do anything to get it to unjam. At the time, there really wasn’t anyone in North America who was fixing those, so it just sat on my shelf.
So I stopped by there the other morning and told him my story. He popped a cover off of the side, manually advanced some gears, there was a pop, and he said “Guess what, it’s fixed.”
Apparently if the film pack battery doesn’t have enough juice it can get stuck between modes, which is what happened. So I thanked him, bought a couple of film packs, and we're back in business.
* As I was investigating the new Impossible Project/Polaroid Originals films, I was amused to find that they are selling refurbished SX-70s for $400. Makes my Value Village find and this week's simple repair even more delightful.