ATR Cockpit/EFB always dark

Do you have the same issue if you follow the OP’s steps to reproduce it?

YES

Provide extra information to complete the original description of the issue:

I have tried to start the aircraft by myself , before yesterday I did not have any issue with the screens but since yesterday I can not turn ON the 5 screens of the ATR. Tried everything i.e DC GPU , batteries , straight away from the runway in order to be already set up but nothing works. Rest of the electrics and avionics working fine , just the screens dont light up. In the beginning they seem to work fine as they light up with the famous green “T” of the ATR´s but later on go dark.

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