Claudius04

Yes, I've deleted everything.

The VHF communications display on the left isn't working; after transferring it from Microsoft, I uninstalled and reinstalled it from the IniBuilds website.

I may have found one of the reasons for the APU malfunction. In the "Controls/Instruments and Systems/Electrics" menu, key 42 on the Honeycomb Bravo was assigned to the "APU Starter" command. I removed it, and it works.

Same cause as Heyado7018, disconnecting the "Honeycomb Bravo" makes the APU work, why?

Thank you for your quick responses, but the problem remains unresolved despite all your advice.

Problem not solved despite MD82's advice, whom I thank. (YouTube link attached) https://youtu.be/pKYwOH8U0E0

Yes, I did activate the fuel pumps on the left or right tanks.

Master power is on and illuminated, but when I press "start", the "NG tachometer" and "TGT indicator" gauges do not function.