My 10A was serviced in Nov. by Dynon because of a blank screen. Since then I have no magenta course line on the HSI screen. How can I get the course line back.
If the service changed your settings, you may need to re-confirm that the correct settings for your external nav source (GPS? SL30?) are configured. Known settings for different nav devices are posted on the Wiki.
A Wiki is a web site where the individual pages can be updated by authorized users. Thus, the user community provides the documentation for interfacing successfully with other radios/GPS etc.
If you have a x96, and we upgraded your firmware from something older to 5.0 or newer, you need to have the output on your x96 set to "normal" not "fast." It's in the advanced serial output setup.