[Redbud40]

Transponder working fine then went into no transponder no ADSB mode.
Figure 7-2. Came back for awhile but then went back into failure mode as in 7-2.
Not much guidance other than what the screen is displaying.
Any suggestions. Unit less than 2 years old.

 

[OKAV8r]

antenna

I would suggest there is about 8 in 10 chance it is the antenna, antenna coax, coax connectors.

 

[bjdecker]

The "No 1090ES TX" error will happen if the GTX 345 looses Baro and/or Position.