When You Can't Unjam Your Jammed Brother HL-3170CDW Printer

(Another "how to fix" something because I couldn't find the solution on the web.)

What are you supposed to do when your printer says "Jam Tray 1" and there's no paper jam to be found?

We have this Brother HL-3170CDW printer:

(It's a great printer: fast, prints duplex and reasonably priced. Although, a bit big and heavy.)

And it stopped working due to a paper jam error and despite not finding any paper jammed in it, it still claimed it had paper jam. The manual was unhelpful in solving the problem. Web searches didn't provide a solution. I emailed Brother support, and they gave me the solution.

How to Fix the Lever that Came Off of Your Kwikset Entry Lock (It Is NOT a Missing Set Screw)

If you have a Kwikset entry lock with a lever, and the exterior lever comes off, and you think the cause is a missing a set screw, it almost certainly is not a missing set screw - the set screw is in fact still there, but screwed in enough into the interior of the post that it looks like it's missing (and no longer able to secure the lever). Jump here for the fix and to skip over any blathering I do in advance of giving the fix.

(This is another in a series of posts to help people fix the same thing I had to fix, where I couldn't find the instructions or found incomplete instructions on the web. Last week I had two things I needed to fix where the fix was given by emailing or talking to the manufacturers' customer support, but not provided on their web sites.)