Picture Shrinks The picture on my TV shrinks rapidly in and out from the sides. It only moves in about 6 inches and mostly at the sides, but sometimes the top also. When it starts, it does it on almost every channel. It's doing it more often and doesn't matter if the sets warmed up or not. Where it moves in the screen is black but as I said, it does this very rapidly. Could this be a power supply problem? Thanks for any help!

If your video is shrinking and expanding you may want to get a repair kit from www.magnavoxhelp.com. This is a fairly common problem. After a few weeks/months of bouncing in and out you may loose all video/audio. That's what my set did before I fixed it. 

It is in the power supply or I would guess most likly in the horizontal sweep section of the tV set. MOST of the time, if the power supply is going lower in voltage, the set will shrink in width,BUT will also shrink in vertical size. If this is not happening, then I would say it is in the horizontal drive circuit. This is not a circuit a user should be experimenting with, as this is the HIGH VOLTAGE circuit and can pack a mean punch! Please if the sets less the 4 to 5 years old you may want to concider an estimate or replacing the set. Its all up to you. GOOD LUCK