TV Picture shrinks down more and more until it gets to a line.

I am not quite certain if it is this tv specifically but it is a toshiba CRT and the picture keeps shrinking down and eventually goes down to a line. If I smack the left side hard enough the picture goes back to normal but has a line close to the bottom of the screen. Also the picture seems to be a little washed out some times. How can I fix these issues. I have soldering skills so if I could get a picture of what I am looking for to get soldered back on it would be great thanks.