Hello,
Before coming to tell you about the problem, I did some research and found nothing. I have the same problem again which reappeared on the IXEG 737 plus 1.5.1. No battery for the launch of the apu and the engines even by connecting the ground power, nothing works in the cockpit above the head. On the other hand there are displays on the dashboard and on the pedestal, Guizmo tells me Failled with the IXEG 737 plus v1.5.1. I've tested deactivating plugins, nothing works, I've deleted and reinstalled IXEG 737 plus 1.5.1, nothing works. The buttons work fine with the mouse and I can assure you that the windscreen wipers work fine too. I also uninstalled the aeroplane and then reinstalled it, but it didn't work. I am attaching the Log.txt file
Sincerely
Log.txt