Epson 400 User Manual page 89

The printer prints an operation check page including the
version of your printer's ROM, the ink counter code, the
current code page, and a nozzle check pattern. Here is a
typical printout:
The above sample is in black and white, but the actual test prints
in color (CMYK).
5. Press the
finishes printing the operation check page.
If the operation check page results appear as shown in
step 4, this means that the printer itself is all right and
that the problem probably lies in the printer software
settings, application settings, the interface cable (be
sure to use a shielded cable), or the computer itself.
If the operation check page does not print satisfactorily,
for example, if any segment of the printed lines is
missing, there is a problem with the printer. This could
be a clogged ink nozzle or a misaligned print head. See
"Problems and Solutions" below for possible causes
and solutions to the problem, or go directly to
"Cleaning the Print Head" on page 6-25.
6-6
Troubleshooting
power button to turn off the printer after it