It happened to me on a long flight, I notified the staff and they rebooted the entire system, every passenger was left without infotainment for ~15min, just so I could have it (idk, maybe I wasn't the only complaint). It worked afterwards, I watched 12 Monkeys.
Everytime I'm on a flight with infotainment, I wonder about the company responsible for writing the software. A small part of me wants to get a job at one of those companies, just to see what the process is like...
A close relative of mine is working for a joint venture (between a medium sized European airline and LG) which tries to get into this market. Just had their first plane outfitted with their screens and software, and is now operational (sort of, they almost didn't get approval).
In all seriousness it could be such a cool and interesting project. But general incompetency, finger pointing, internal power plays, and management neglect make it just as bad as you imagine already.
I see a power button there; have you tried turning it off and on again? How about holding the volume brightness up button while holding the power button as it boots to get into the recovery mode?
I recognize that inflight entertainment system! I believe you are flying on an ex Virgin America plane and if it still has the same software stack that Virgin America was using then the game gem drop was a port of bill Kendrick's gem drop x. There's actually an Easter egg within that port with Bill's face hidden in the game.