Why does my TV Screech when I plug in my Yellow Video RCA Cable?

Question

It never done that before... I tried the back of the tv too and it does the same thing. ONly with video though, not audio.

Answer 1

you are plugging the yellow "Video" cable into the audio jack.

Answer 2

That will happen if you plug the yellow plug into either the red or white input jacks.  It is an easy mistake to make since white and yellow look very similar in low light conditions, such as behind a TV.