Printer repair at a dentist office in Tulsa turned into a 4.5 hour standoff with a single driver
The old Lexmark kept throwing a 900.00 fuser error so I swapped the fuser, then the power supply, then found out the dental assistant had been shoving the tray in hard enough to bend the sensor arm, and she watched me do all of it without saying a word.
Did you ask her at any point if anything happened to the printer before you got there? That one question at the start would have saved you three parts and half a day. People love to watch you work and stay quiet until the bill shows up.