Epson LT-286 - Manual (Page 114)

5. If the plug has retaining screws, tighten them with a
screwdriver.
6. If necessary, plug the monitor’s power cable into the power inlet
on the monitor. (Some monitors come with permanently
attached power cables.) Then plug the power cable into an
electrical outlet.
7. Turn off DIP switch 4 above the keyboard to let the computer
know you will be using a monitor instead of the LCD screen.
(See “Setting the DIP Switches” in Chapter 1.)
When you are ready to use the computer, turn on the monitor and
any other peripherals, then turn on the computer. Text will be
displayed on the monitor screen instead of the computer screen.
A-2 Connecting an External Color Monitor