If the printer control panel light sequence matches the light sequence in the preceding illustration, then press twice quickly to see the supplemental light sequence.
If the supplemental light sequence matches the light sequence in the preceding illustration, then do the following:
Turn off the printer.
Unplug the power cord from the electrical outlet.
Note: Optional trays lock together when stacked. Remove stacked trays one at a time from the top to the bottom.
Remove the extra tray or trays.
Connect the power cord to a properly grounded electrical outlet.
Turn the printer back on.