Lexmark MX722
Open door A.
Warning—Potential Damage: To prevent damage from electrostatic discharge, touch any exposed metal frame of the printer before accessing or touching interior areas of the printer.
Remove the used toner cartridge.
Unpack the new toner cartridge, and then shake it to redistribute the toner.
Insert the new toner cartridge.
Close the door.
The printer posts a ' error. This error indicates that a different starter cartridge is inserted into the printer.
Avoid printing delays. Install a new imaging unit when the printer prompts you to replace it.