Oh yes - and it's nearly always the obvious thing that you didn't bother to check as that would be just too simple. This morning a local shopkeeper said that their monitor was displaying a strangely narrow picture. I went through just about every setting with no joy, then finally looked at the buttons on the monitor: surprise! Touched one of them and the screen toggled back to normal.
The 'buttons' were static-charge operated and one must have got touched by the papers on the user's desk. Had I gone for the simple first...grr.
