Lexmark T420 User Reference page 111

Hex Trace Ready
What this light sequence means:
The printer is in the Ready mode and Hex Trace is active. Hex Trace
helps you determine if there is a problem with the language
interpreter or the cable.
What you can do:
Press and hold Cancel to reset the printer.
Waiting
What this light sequence means:
• The printer is waiting until a print timeout occurs or it receives
additional data.
• The collation of pages is enabled, but the print job is not finished
processing. The collation feature requires that the print job ends
processing before the collated copy is printed.
What you can do:
• Press and release Cancel to cancel the print job.
• Press and release Continue to print the contents of the print
buffer.
• Press and hold Cancel to reset the printer.
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