I can't get the default GPS 295 to work in P3D. It's just blacked out. I use this on some A2A birds, but I'll probably replace it with the GTN750 soon.

 

Must be some real rookie mistake I'm doing, what am I missing? The "on" button? 

Nevermind  :blush:

 

I found the "GPS battery" option in the A2A menus...