Epson EPL-N1210 Setup Manual page 35

Note:
When inserting the interface card, make sure that the component
side of the card is on the left.
6. Secure the interface card with the two retaining screws.
To verify that the interface card is correctly installed, print a status
sheet by pressing the Enter button two times when the printer is
online.
If the interface is not listed on the status sheet, try reinstalling the
card making sure the card is securely fastened to the socket inside
the printer.
Unpacking and Assembling the Printer
29