The toner cartridge is not a valid cartridge
for your printer.
The toner cartridge is missing or installed
incorrectly. Install or reseat the toner cartridge.
Turn
the machine off, then wait a few minutes for the machine to
cool.
Open
the front cover.
Holding
the corresponding print cartridges handle, rotate it counterclockwise,
and pull it out to remove from the machine.
Take
a new print cartridge out of its package.
Holding
the print cartridge, shake thoroughly it from side to side to
distribute the toner.
Remove
the cartridge cap.
Grasp
the print cartridge and align it with the corresponding slot
inside the machine. Insert it back into its slot until it clicks
into place,
and rotate the print cartridge clockwise.
Close
the front cover. Make sure that the cover is securely latched,
and then turn the machine on.
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