Epson LT-286 - Manual (Page 27)

Switch 5, enable or disable internal display controller-If you
have attached an optional expansion chassis and you are using an
external video controller card (such as an Enhanced Graphics
Adapter) in the expansion chassis, set this switch off. Otherwise,
set it on.
Switch 6, external monitor type-Switch 6 is important only if
you are using an external monitor attached to a video controller
card in an expansion chassis and you have set switch 5 off. If your
external monitor displays color, set this switch on. If your external
monitor is monochrome, set this switch off.
Note
If switch 5 is on, the computer ignores the setting of switch 6.
6
Inserting the Startup/Operating 1 Diskette
Follow these steps to insert the Startup/Operating 1 diskette:
1. Hold the diskette with the printed label facing up and the
arrow pointing into the diskette drive, as shown in the
following illustration.
1-14 Setting Up Your System