when i saw this i couldn’t help but laugh.

my mother is a very intelligent woman who, for some unknown reason, has serious trouble using the remotes (and various other forms of technology – don’t get me started on her and ‘smart phones’). she will be fine for a little while (turns the tv on, changes channel etc) and then i will get a frantic/annoyed/angry phone call about the ‘stupid tv’ which for some reason won’t work.

in most cases it is because she has hit a wrong button and/or changed some setting. 

this might just be the answer.