TV recognised as speaker only, only audio mirrored

I've got Apple TV 2 and a set of iPad 2, iPhone 6+ and Mac. A TV worked OK (movies purchased or rented) with two different TV sets on 2 different locations for more than 2 years. Suddenly TVs are being recognised by iOS devices as speakers, icon for TV and mirroring bar disappeared from menus, speaker icons appeared. On Mac in iTunes the same: speakers instead of TV icon!? All OSs updated, A TV as well. Read all manuals, forums etc, clueless. Pls help! Ales