Lexmark T420 User Reference page 112

Ready with Toner Low
What this light sequence means:
The printer is ready to receive and process 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.
Hex Trace Ready with Toner Low
What this light sequence means:
The printer is in Hex Trace mode to help you determine if there is a
problem with the language interpreter or the cable, 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.
for an illustration of
for an illustration of
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