This wasn’t “20 minutes to repair the problem”: this was “20 minutes until I got bored enough to go and ask what was going on, and why they hadn’t announced that there was a problem.” There was then a further 10 minutes before they took my advice and apologised to the audience, by which point we were already stood out in the foyer, waiting for the manager so that we could get our money back.

Apparently screen 6 is digital, based on the discussion between the people who were repairing it.