A310 can't work.

[mico]

A310-300 can't work suddenly.All panel is dark and all button can't use. But it is normal before.

[pfeiferbj]

Yes, I had the same problem, all the panels dark but the engines are running.  I have MSFS 2020.  Is there a fix?

Thank you for your response.

[mico]

I'm MSFS2020 too. It can use before. Other message say because navdata version. I don't know how to fix it