Epson EL 486UC - Manual (Page 112)

The printer prints garbled information.
Check the printer manual for the printer’s correct DIP switch or
control panel settings.
Also, make sure you have the proper drivers installed for your
printer and make sure you’ve selected the correct printer
within your software application.
Option Card Problems
A newly installed option card is not working correctly.
Make sure the option card is installed correctly and is
well-seated in its slot. Run the SETUP program to update your
computer’s configuration after you install the card. Also,
perform setup procedures for any software you are using with
the option card.
See the documentation that came with the option card to set
any necessary DIP switches or jumpers on the card.
The computer may also have some jumpers that must be set for
the option card to work properly. See Chapter 3 for system
jumper information.
Your system may need to operate at the slower processor speed
to access the device. Try reducing the processor speed (see
Chapter 2).
You may have inserted an older option card that works at
-5 volts. Make sure you install option cards that meet the
system’s power requirements.
Troubleshooting 6-11