GTN 750 and Vertx Diamond DA62 autopilot working?

[Gil Yoder 2]

I have installed the GTN750/650 2.5.17.0 in P3D4 and installed the GTN 750 as a popup in several aircraft, both default, and third-party add-ons. The GTN 750 shows a black screen when all power is turned off, and then a dark grey screen when power is applied with the comment "starting..." in black at the bottom left of the screen.

It never goes beyond that message and stays on the dark grey screen indefinitely.

Please, how can I fix this issue?

Thank you.

Gil Yoder

[Gil Yoder 2]

After restarting P3D the GTNs started working. Unfortunately they don't seem to work with the Vertx Diamond DA62. I can create a flight plan with them, but the autopilot doesn't work with it, so I can't use it to fly a course with autopilot. 😞