Epson PRO Reference Manual page 50

The No Ink Cartridge light is on, and the printer does not
print.
One or both ink cartridges are not installed. Install both ink
cartridges.
The printer makes a grinding noise and does not feed
paper.
Something is pressing against the knob on the printer's right side.
Turn off the printer and move it so there is at least two inches of
space around the knob. The printer will not work if anything is
pressing against the knob.
All lights except the Operate light flash and nothing prints.
Contact your dealer or an authorized service provider.
Printing stops and the Data and Pause lights flash.
There is a problem with the carriage. Turn off the printer. After
a few seconds, turn it back on and try printing again. If this does
not solve the problem, contact your dealer or an authorized
service provider.
The printer sounds like it is printing, but nothing prints.
The print heads may need cleaning. See "Cleaning the Print
Heads" on page 3-2 for instructions.
One or both ink cartridges are empty or too old. A cartridge is
too old if it has been used longer than six months or beyond
the date on its packaging. Try running a self test, as described
in the Setup and Software Guide. If nothing prints in black or
color, you need to replace the ink cartridges.
Maintenance and Troubleshooting
3-17