Dell 1710 User Manual page 51

What this light sequence means:
The printer is in the Ready mode, and Hex Trace is active.
What you can do:
Advanced users can use Hex Trace to help troubleshoot printing
problems. After resolving the problem, turn off the printer to exit Hex
Trace.
Press and hold Cancel
What this light sequence means:
The printer is waiting until a print timeout occurs, or until it receives additional
data.
What you can do:
Press Continue
Press and release Cancel
Press and hold Cancel
to reset the printer.
to print the contents of the print buffer.
to cancel the print job.
to reset the printer.