Every time I open the Cessna Citation Longitude in the cold and dark mode immediately all lights and PFD and MFD's are flashing.  There is nothing I have been able to do to stop them.  I go to external power and  start the APU but when I try to put the APU on line all lights continue to flash.  When I go to external power, I can start the APU but then when switching to APU power, the APU shuts down.  The only way I can fly the airplane is to open it up on the runway.  I have no idea as to how to solve this problem.  Anyone have any suggestions?  To be honest I don't know if this happens on other airplanes, as this is the only one I fly.  By far my favorite airplane.  Would appreciate any suggestions to solve this problem.  Thanks.

Rodger

2020 or 2024? I haven't your problem with 2020.

Edited December 22, 20241 yr by Ixoye

10 hours ago, Ixoye said:

2020 or 2024? I haven't your problem with 2020.

2020

Have you added any liveries? If so, try using the default livery and remove any addon liveries to test. Often strange issues with the Longitude are caused by issues with a livery.