Epson 20 - Manual (Page 139)

3. If you used the option card to add an external device to your
computer, did you use the proper cable to connect the device to
the option card connector on the back panel?
4. Did you run the Setup program to redefine your computer’s
configuration after installing the option card? See Chapter 2.
5. Did you perform the necessary setup procedures for the software
you are using? If necessary, see your software manual for
instructions on running the software setup procedure.
A-8 Troubleshooting