KFC 150 Autopilot does not indicate heading, nav or approach modes

[p7th0n]

The modes do appear to activate but there is no visual indication.

[Black Square]

Either, just try cycling to another hot swappable radio configuration once, and that might fix it, or...

From the FAQ in the manual:

This is indicative of GPS addon incompatibility. Please make sure that you have updated all the avionics packages that you are using, including the TDS GTNxi 750, PMS50 GTN 750, and that you do not have any outdated packages.