Hello. I have recently been having this issue with my MCDU 1. Every so often when I start a flight, it will come up with A0-0 and Engine info UNKNOWN. I am also unable to use the MCDU (none of the buttons work). Sometimes restarting FSX solves this but not always. Does anybody know why? Does anybody know what I can do?    Kind regards, Rhys 2016-6-12_18-48-9-525.BMP