Suddenly, as of this morning (1.00am), my system can no longer play MP4 720p HD files

Hi StephenB

I've re-edited and summerise my last post to show the solution and to thank you for your help in my time of dire need, now on with the solution:-

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I think I've found the reason why my system so was so suddenly and unexpectedly went belly up, the clue lays in one of our discussions, especially about the Plex app installed on my player, i.e my NowTV black box (Roku 3 clone).

The morning when I was going to watch some films my bandwidth suddenly dropped, Plex responded by making some automatic changes to it's own settings. However, when the bandwidth came back up again Plex did not reset itself back to it's original settings.

When accessing the Plex app I scrolled down to the Preferences menu and found that the quality settings had been reset from 4.0mps - 720p to 1.5mps - 480p, I was stunned because I had not touch those or any other settings, also the text at the top of the screen suggested that my Internet bandwidth had dropped, at the time I had no idea this had happened.

I'm guessing that the settings dropped to accommodate the lower bandwidth and so could no longer play any files above 480p.

Anyway, I reset the quality settings from 1.5mps - 480p up to 3.0mps - 720p and I can now play 720p HD files again.

Thanks for you help because without it I would not have stumbled across the solution.

UK Bob