Garmin G1000 NXi Supplemental Maintenance Manual page 84

Symptom
A button/knob/joystick does not
appear to function
Terrain/Obstacle/SafeTaxi does not
display
Display will not track dimmer bus
G1000 Supplemental Maintenance Manual
Textron Nav III Series
190-02128-04
Recommended Action
•
Go to the GDU TEST page in configuration mode and verify button, knob, or
joystick operates correctly by observing a change in color from red to green in
the button/knob/joystick icon when the button/knob/joystick is pressed. If a
button is stuck, the button icon will be green without pressing the button as
soon as you turn to the GDU TEST page.
✓
If problem is verified, replace GDU.
•
Allow the system to verify the data in internal memory for approximately five
minutes after power-up.
•
If a database does not activate, reload the problem database.
•
Reload GDU configuration files.
•
Swap PFD and MFD to see if problem remains with display.
✓ Replace display if condition remains with the same unit.
✓ If condition remains in original position after swapping displays, check GDU
dimmer input to verify voltage is present.
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