Dell 1710/n Mono Laser Printer - Manual (Page 55)

What this light sequence means:
The code in an internal print server has not been programmed, or the
programmed code is not valid.
What you can do:
Download valid network code to the internal print server. Press Continue
twice quickly to see the secondary error code. See
Secondary error codes for
more information.
What this light sequence means:
The printer is ready to receive and process data. In addition, the toner in the
toner cartridge is getting low.
What you can do:
Press Continue to print the menu settings page for a list of current
printer settings.
Remove the toner cartridge and shake it to extend the life of the
cartridge.
Replace the toner cartridge. (See
Replacing the Toner Cartridge for
help.)
Press and hold Cancel to reset the printer.
NOTE: This light may not come on if the starter toner cartridge is installed in
a base printer model.