Epson Stylus Color 850 User Manual page 153

4. Hold down the
button to turn the printer on. Then release both buttons.
The printer prints a nozzle check pattern and samples of the
factory default fonts and colors continuously until you end
the test.
The above sample is in black and white, but the actual test prints in color.
5. To end the self test, turn off the printer. The printer ejects any
paper from the paper path.
9-6
Troubleshooting
E
load/eject button and press the P power