![](/images/new-backgrounds/1320837/32083761x1.webp)
4.The ROM, RAM and NMEA port are checked, with the results shown as OK or NG (No Good). For any NG, request service. (A special connector is required to test the NMEA port. Nothing appears if no connector is connected.)
5.The squares at the right side of the test display are for checking the controls. Press each key and the arrows on the Cursor Pad one by one. A control’s corresponding
6.To return to the Installation menu, press the [MENU/ESC] key three times.
7.To restore normal operation, turn off the power and turn it on again.
3.8 Test Pattern
This feature tests for proper display of tones.
1.Turn on the power while pressing the [MENU/ESC] key. Continue pressing the
[MENU/ESC] key until the Installation menu appears.
2.Press▼ to choose LCD PATTERN.
3.Press ► to start the test. The entire screen is black.
4.Press ► again and the screen turns white.
5.Press ► again and the screen shows a
6.Press ► again to return to the Installation menu.
7.To restore normal operation, turn off the power and then it on again.
BLACKWHITE
Test patterns
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