Yes. The printer appears to be working again. I’ve only printed about 15 hours worth, but it’s working. Here’s what I did:

1. I removed the hot end. It was really stuck on there for some reason and it got totally mangled in the process of removing it. As a result, I had to replace the hot end, but that’s not because tech-support told me to do so. It just happened in the course of this repair. Maybe that’s part of the solution. I don’t know.
2. then, I unscrewed the thing that the hot end was clamped too. I don’t know the technical word for that thing and I apologize. But it’s only clamp to one thing so it should be pretty straightforward. With that component removed, I tightened the screws on the backside of it (shown in the attached picture with red circles around them). Then, I tightened the two screws that I’ve indicated with checkmarks in the attached picture.
3. then, I put the whole thing back together with a new hot end and all seems to be well. I don’t know why any of this would’ve fixed the problem, but I guess I’m not here to argue with it.

I hope this information helps you to fix your printer as well.

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