User`s guide

Chapter 4 Using the Microcal Diagnostic Utility 105
If you notice some problems, try adjusting the contrast and brightness
controls on the monitor. These controls help optimize color
convergence.
If there are still problems with the video, you can continue to
troubleshoot the problem by using the Color Purity option. Remember
that a bad video indicates a hardware problem with the monitor, not
the touchscreen.
To exit from Color Bars and return to the Main menu, press Esc.
Color Purity
Every monitor has three electron guns (or signals) that send the
primary colors – red, green, and blue – to the screen. The Color
Purity option lets you test that each electron gun works properly.
You can test each primary color individually. You can also test
combinations of these colors to produce the same 16 colors shown
in the Color Bars option.
The advantage of the Color Purity option is that the color fills the
screen. You can check a color for a consistent appearance and
saturation across the screen.
When you select the Color Purity option, Microcal fills the screen with
black and displays the following dialog box: