Canon LBP-1000 User Guide

After you started printing, a computer message tells you it cannot
write to LPT1?
The printer could not receive the data from the host computer because
the printer took too long to process the current data in the printer.
You may have to increase the I/O TIMEOUT setting or disable it in the
PARALLEL1 MENU or PARALLEL2 MENU (see pages 71 to 73).
-or-
The printer and host computer are not securely connected.
Check the cable connection at the host computer and printer.

Printer is off-line.
Press Go to turn the indicator on and put the printer on-line.

Is acceptable paper being used?
Always use paper that is acceptable for this printer.
See “Print Media Specifications” on pages 185 to 192 for detailed
information on the paper acceptable for the printer.

Printed pages are dirty or have white specks?
The fixing roller inside the fixing assembly has become dirty with toner
dust.
Clean the fixing assembly inside the printer.
See page 155 for detailed information on cleaning the fixing assembly.
-or-
The inside of the printer has become dirty with toner residue.
Clean the transfer guide area with a clean cloth. See pages 118 to 119
for detailed information on cleaning the transfer guide.
If the problem persists, repeat the cleaning procedure above a few
times.

Printing won’t
start

High jam rates
misfeed,
multiple sheet
feed errors

Printing with
black spots or
white specks