Garmin G1000 Mooney M20TN - Manual (Page 343)

190-00647-00 Rev. A Garmin G1000 Pilot’s Guide for the Mooney M20M/M20R/M20TN A-7
APPENDIX A
System Annunciation Comment
Display system is not receiving airspeed input from air data computer.
Display is not receiving altitude input from the air data computer.
Display is not receiving vertical speed input from the air data computer.
Display is not receiving valid heading input from AHRS.
GPS information is either not present or is invalid for navigation use.
Note that AHRS utilizes GPS inputs during normal operation. AHRS operation
may be degraded if GPS signals are not present (see POH).
Display is not receiving valid transponder information.
Other Various Red X Indications
A red ‘X’ through any other display field, such as engine instrumentation
fields, indicates that the field is not receiving valid data.