Dell Inspiron 7000 Reference And Troubleshooting Manual page 136

The second screen is the red/green/blue (RGB) color combination screen. This screen
allows you to test the ability of the display or monitor to increase or decrease the
intensity of the three basic colors.
The RGB color combination screen displays an RGB box in the top center of the
screen with individual red, green, and blue boxes beneath it. Underneath the individ-
ual color boxes are three lines that show the intensity of each color. Type r, g, or b to
adjust the intensity of the corresponding color; then press the right-arrow key to
increase the color intensity, or press the left-arrow key to decrease the intensity. Type
y if all the squares are the correct colors; otherwise, type n.
The Solid Colors Test checks whether the video subsystem is displaying the correct
colors. This test also lets you check for missing pixels. When this test is running, four
screens appear sequentially—a red screen, a green screen, a blue screen, and a
white screen. Check each screen for missing pixels, and verify that the correct color is
being displayed.
When the test is complete, a message asks if you are satisfied with the quality of the
colors. Type y if all the pixels were present and if the correct colors were displayed;
otherwise, type n.
B-8 Dell Inspiron 7000 Reference and Troubleshooting Guide