Epson LT-286 - Manual (Page 44)

en certain memory-resident programs are running, the
screen’s backlighting cannot be restored after it has been turned
off. If you find that the screen’s backlighting does not come back
on when you press a key, you may want to set the backlight
period to Not time limit. Another way to avoid this problem is
to use the Epson LIGHTON utility. See chapter 5 for details on
the LIGHTON utility.
When you have selected the backlighting period, highlight
SAVE
SETTINGS
and press Enter. The main menu reappears.
Gray Scale
The Gray scale option on the setup menu allows you to define
the correspondence between colors and gray tones in gray-scale
mode 3 (see Chapter 1). If you are not planning to use gray-scale
mode 3, you do not need to set the Gray scale portion of the
setup program.
To define gray-scale mode 3, highlight Gray scale on the setup
main menu and press Enter. The following display appears:
4.00 1988
2-10 Running the Setup Program