Black GTN Screens on C414AW

[Greg]

Hello Greg,

Let's run this in a step by step manner, can you start the TDS GTNXi from the desktop shortcut with MSFS closed? Then click on the GTN750Xi button, please let us know if the screen lights up.

Do you run external hardware? Maybe the avionics bus (switch) is set to off?

Thank you for your response.  The GTNXi ran fine from the desktop and worked with the C414AW even integrating with the autopilot.  I decided to try a different livery that also included the GTNXi.  To my surprise that worked.  Now all of the TDS GTNXi liveries work properly,  including the one that originally failed.