Behodar:

Brunzy: A quick test to see if the Line output of a CRT Tv was working was to listen. The LOPTX ( transformer) rings at 15,625Khz, but generally none of the older techs could hear it.

 

It used to drive me and my brother mad when my parents would mute the TV (in the next room) at dinner time. It's just sitting there going *squeal*...

 

 

When I was a teenager my parents would turn off the Sky/VCR/whatever before they went to bed, without turning off the TV, leaving it with a blank screen. I would wake up in the middle of the night and get so annoyed by the noise that I would get up and turn it off.