Lexmark T420 User Reference page 113

Busy with Toner Low
What this light sequence means:
The printer is busy receiving data or printing, and the print cartridge
is low on toner.
What you can do:
• After the print job finishes, remove the print cartridge, shake it,
and reinstall it. See page 72
for an illustration of how to shake the print cartridge.
• Press and release Cancel to cancel the print job.
• Press and hold Cancel to reset the printer.
Waiting with Toner Low
What this light sequence means:
The printer is waiting until a print timeout occurs or it receives
additional data, and the print cartridge is low on toner.
What you can do:
• Remove the print cartridge, shake it, and then reinstall it. See
page 72 in Replacing the print cartridge
how to shake the print cartridge.
• Press and release Continue to clear the message and continue
printing.
• Press and release Cancel to cancel the print job.
• Press and hold Cancel to reset the printer.
in Replacing the print cartridge
for an illustration of
113