The switch was trying to load c3750-ipservicesk9-mz.122-55.se12.bin —the exact file that had been corrupted. It was a self-referential nightmare. She needed that file to fix the switch, but the switch needed the switch to load the file.
################################################## 100% c3750-ipservicesk9-mz.122-55.se12.bin
She set up a TFTP server on her laptop, forced the switch into ROMmon mode, and began the transfer. The progress bar moved like cold honey. The switch was trying to load c3750-ipservicesk9-mz
But something else happened.