Garmin G1000 Maintenance Manual page 70

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5.4.3 Cooling Alerts
Message
MFD1 COOLING – has poor
cooling. Reducing power
usage.
PFD1 COOLING – has poor
cooling. Reducing power
usage.
5.4.4 Key Alerts
Message
MFD1 "key" KEYSTK – key is
stuck.
PFD1 "key" KEYSTK – key is
stuck.
Page 5-34
Rev. B
Cause
The MFD has exceeded
its operating temperature
range.
PFD1 has exceeded its
operating temperature
range.
Cause
The system has
determined a key is stuck
on the MFD.
The system has
determined a key is stuck
on PFD1.
Solutions
•
Check cooling fan and wiring for
proper operation.
−
Replace cooling fan if unable to
determine if operating correctly.
•
If problem persists, replace the
MFD.
•
Check cooling fan and wiring for
proper operation.
−
Replace cooling fan if unable to
determine if operating correctly.
•
If problem persists, replace the PFD.
Solutions
•
Go to the GDU TEST page in
configuration mode and verify key is
stuck (if key is stuck the
corresponding indicator will be
green).
•
Exercise suspected stuck key and
reset GDU TEST page to see if
indicator remains green without
pressing the key.
•
If problem persists replace the
display.
G1000 System Maintenance Manual
190-00907-00