Epson EPL-N3000 Reference Manual page 228

Caution:
c
Be careful not to damage the cable when tightening the
screws.
Do not remove any modules from the circuit board.
Otherwise, the printer will not work.
10. Reattach the shield cover with two screws as shown below.
11. Reattach the right side cover to the printer as shown below.
Then, tighten the screw on the back of the printer.
Installing Options
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