Garmin G1000 Line Maintenance Manual page 109

Uncontrolled if Printed
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Table 4-2. GDU 1050 System Messages (Continued)
System Message
DB MISMATCH
FAILED PATH
MFD1 BACKLIGHT CAL
MFD1 CONFIG
MFD1 COOLING
MFD1 KEYSTK
MFD1 MANIFEST
MFD1 SERVICE
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LMM for the Kodiak 100
190-02102-00 Rev.4
Cause
Terrain database
mismatch.
A data path connected to
a GDU and/or GIA has
failed.
MFD1 backlight
calibration lost.
MFD1 configuration error.
MFD1 has poor cooling.
Reducing power usage.
A key is stuck on the
MFD1 bezel.
MFD1 software mismatch. • Load the correct software.
A fault has been detected
in MFD1.
Recommended Actions
• Load the correct database
type and version in both
displays.
• Determine which data path
has failed and check wiring
continuity for the failed
path.
• If the problem persists,
replace the affected LRU.
• Replace the GDU.
• Reload configuration to the
GDU.
• If the fault persists, check
the master configuration
module harness for faults
and replace if necessary.
• Check the avionics
environment for proper
cooling and make any
necessary corrections.
• If the fault persists, replace
the GDU.
• Select the GDU Test page
and verify the key is stuck
(corresponding indicator
will be green).
• Exercise the suspected
stuck key and reset the
GDU Test page to see if the
indicator remains green
without pressing the key.
• If the fault persists, replace
the GDU.
• Replace the GDU.
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