A couple of different patrons reported to me that the 2nd floor scanners were not working. The one on the right genuinely seems to be out of order. I will be placing a sign on it after I publish this post. The scanner on the left fixed itself when I unplugged the power cord in the back, waited a few seconds, and then plugged it in again.
The right hand scanner is working. I put some binding tape over the scanner carriage lock on the bottom. Hopefully that keeps it from getting locked again.