Furuno CSH-5L/CSH-8L - Manual (Page 80)

8. MAINTENANCE, TROUBLESHOOTING
8-10
Color test
The color test checks for proper display of colors. Press the [EVENT] key to
change the screen color, in the order of white, red, green and blue.
WHITE RED GREEN BLUE
Color test
Pattern test
The pattern test displays concentric rings overlaid on a grid to test for proper
display of rings and horizontal and vertical lines.
If the test shows error (for example, no horizontal or vertical lines shown), see
the monitor’s operator’s manual for how to adjust the monitor.
PATTERN TEST
PRESS [MENU] KEY TO EXIT
Pattern test