<![CDATA[GTN750 suddenly goes black]]>Hi,

i just want to do a longer flight at FL 105 and after 10 minutes in flight the GTN750 went black. I have no failures activated and was not able to restart it. Any idea what happens?!Screenshot 2026-09-29 093314.png

]]>https://community.justflight.com/topic/11407/gtn750-suddenly-goes-blackRSS for NodeTue, 29 Sep 2026 13:14:12 GMTTue, 29 Sep 2026 07:36:15 GMT60<![CDATA[Reply to GTN750 suddenly goes black on Tue, 29 Sep 2026 09:01:19 GMT]]>The main alternator is the rocker switch to the right of the battery master switch.

]]>https://community.justflight.com/post/54925https://community.justflight.com/post/54925Tue, 29 Sep 2026 09:01:19 GMT<![CDATA[Reply to GTN750 suddenly goes black on Tue, 29 Sep 2026 07:48:10 GMT]]>@Black-Square Screenshot 2026-09-29 094738.png

Just to confirm you mean this one to on?

]]>https://community.justflight.com/post/54924https://community.justflight.com/post/54924Tue, 29 Sep 2026 07:48:10 GMT<![CDATA[Reply to GTN750 suddenly goes black on Tue, 29 Sep 2026 07:38:49 GMT]]>@Black-Square To be honest not sure. I will try it again , same flight and will double check if the alernator ist active. Thx for your quick reply!

]]>https://community.justflight.com/post/54923https://community.justflight.com/post/54923Tue, 29 Sep 2026 07:38:49 GMT<![CDATA[Reply to GTN750 suddenly goes black on Tue, 29 Sep 2026 07:37:26 GMT]]>Looks like you've lost all electrical power, and your ammeter is showing a draining battery. Did you forget to activate your alternator?

]]>https://community.justflight.com/post/54922https://community.justflight.com/post/54922Tue, 29 Sep 2026 07:37:26 GMT