Apple 578, 575, 577, 560, 550, 500 manual Midrange

Adjustments	Video - 16
3	Select the Screen Control
	Panel in the Control
	Panels folder. Drag the
	brightness control to
Gray Bars	midrange.
4	Note the predominant
	color.

5 Using a hex-head plastic adjustment tool, alternately adjust the red (RB), green (GB), and blue (BB) background controls until there is no predominant color in the four darkest bars.