Fenix MCDU button issues | MobiFlight | Page 1

queen dust May 19, 2026, 10:29 AM

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Please help. I’m able to see the Fenix mcdu display on my Winwing mcdu, but I’m not able to get the button press to work. It was working fine before. I don’t know what happened. Can you please assist?

golden heron May 19, 2026, 12:39 PM

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Does Mobiflight log the button press and release events?
Did you load a profile that contains the MCDU keys mapping?

queen dust May 19, 2026, 11:09 PM

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Yes I did on profile. Yes on events.

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It works for a while and after a few minutes the button press goes off.

golden heron May 19, 2026, 11:40 PM

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Please post screenshots of one of the keys input config for review... The input tab with the code box open, both on press and on release tabs.

queen dust May 20, 2026, 2:22 AM

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When mcdu works it logs the events. When it stops working there’s no log event.

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golden heron May 20, 2026, 5:05 AM

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OK that would most likely point to an issue with the serial communications between your MCDU unit and windows.

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Check your usb cable
Check your hub
Check usb port

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Is the hub powered? It should be

queen dust May 20, 2026, 9:45 AM

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Yes it’s powered

queen dust May 20, 2026, 10:59 AM

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Do I still need to be in the beta version? If so I’m not able to get it. It’s checked off but it seems like I’m in the new version of 11

golden heron May 20, 2026, 12:11 PM

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You don't need the beta version, unless you would like to test the new features or bug fixes before they come to the official version.

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Versión 11.1.0 is the latest official release

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The 10.5.3 beta was unusually long because of all the issues found in switching over the UI to the new framework.

#Fenix MCDU button issues