HSI problem

[johnsteichen]

For several months my Dynon and Garmin GTN750 were functioning perfectly. I recently added a EMS module and added it to the network. I also loaded the new v3.3 firmware. Now no needles show up for either GPS or VOR/LOC nav source selection. To confuse things, At the same time I noticed a "GTN needs service: warning out of the Garmin. I am getting that serviced first. The ADHARS 429 does have a red light so it is getting power. There is some data transfer occuring in the activity page. The input plug to the 429 module was not disturbed. I did add a splitter to the system to wire in EMS module. Once I get the garmin back, I will check to see if IT is the problem before proceeding with any further trouble shooting. :-X

 

[dynonsupport]

Even before the Garmin gets back, what is reported under SETUP MENU > SYSTEM SETUP > NETWORK SETUP > NETWORK STATUS with all modules powered up? Are all modules there, up to date, and free of errors and warnings?