(I received a trouble ticket for an HP 930c Printer at our Ohio warehouse.)

Me: “Hello, I hear you are having a problem with your printer.”

Customer: “Yes, I changed the cartridge and it says that it’s still out of ink.”

Me: “Ok, did you remove the blue tape before inserting the new print cartridge?”

Customer: “Yep! Sure did!”

(After literally two hours of model number and cartridge number verification and even installing new firmware on the printer among many other things…)

Me: “Ok ma’am, can you take the ink cartridge out for me?”

Customer: “Ok, it’s out.”

Me: “Is there blue tape over the copper on the bottom of the cartridge?”

Customer: “Yep.”

Me: “Could you remove it and re-install the cartridge?”

Customer: “Oh hey! It works!”

(I’ve never wished more that I could slap people via telephony.)

Related:
PEBCAK, Episode II
Problem Exists Between Chair And Keyboard