ATR 72-600 All PFD & MFDS go to black after "Ts" disappear

All versions of the ATR 72-600 have the same problem. All screens go black after the T graphics disappear. I have used a manual power up by switching on the battery and connecting a ground power supply. I have also used the shortcut methods provided in the EFP such “Ready for Taxi” but screens go black after “T” test.
I have removed all mods and addons. I have turned Developer mode on and off but no change. I have not made any changes to Developer mode.
Windows 10
Are you using Developer Mode or made changes in it?
I have deleted the aircraft from my purchases and re-downloaded but still have black screens after boot-up[date=2023-10-29 timezone=“Europe/London”]

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