Epson Apex 20020 - Manual (Page 33)

Move the switch to the right to select color and to the left to
select monochrome. If you have an EGA or VGA monitor, set
the switch to color.
8
Turning On the Computer
Before you turn on your computer, read the following safety
rules to avoid accidentally damaging the computer or injuring
yourself:
Never turn the computer on with a protector card in the
diskette drive.
Do not unplug cables from the computer when the power
switch is on.
Never turn off or reset your computer while a disk drive
light is on. This can destroy data stored on disk or make an
entire disk unusable. Similarly, never remove a diskette
from a diskette drive while the drive light is on.
Setting Up Your System 1-15