Pamann- I think it may be something on this particular flight LCA-EMA as parents travelled back a week later on different aircraft WF and same happened screens used for briefing and then crew would not turn them on.
It was good for the people that wanted to sleep as we were airborne at 01:38 and bar service was all completed by 02:00 lights out for four hours and not put back on until 10mins before landing. By having the lights out totally I did get some amazing views of Eastern and central europe