Tv knocked over

Like the Other tech, said Most likly the shadow mask inside of the picture tube shifted and the only way to fix that is by changing the Picture tube. You may be able to minamize the discoloration with a deguassing coil, but not likly. Good Luck

change the picture tube the screen has moved..sorry...good luck..

I had a TV the did the same. You can get an electric magnet (from an electrics store sucha s Radio Shack) and demagnatize the T.V. Or a cheap way to do it is turn the T.V. off and drag close to the front of the screen(obviously not touching it though) a car stereo speaker from the center to the edge.

Let me know if this helps.