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Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault . Search the site by type in the Brand Name of your set, in its search bar at the right side column, and press enter. See it in Webview with mobile or by desktop. Mobile View has no search box.
Screen-shots to defective LCD panels are given. You can see and compare to that to your TVs', and can make sure about the fault to an extent
If the physical size of your screen is 4:3 the only thing it can show is a compressed version. The screen is physically not able to show the true 16:9 version. The true 16:9 HD signal has been developed to show on a screen that is twice as wide as it is long or 16:9 ratio. Your screen is almost square or 4:3 ratio. I hope this helps. Thanks for using fixya.
Perhaps 2 things. Does TV get a picture without DVD connected? If so I would bet you have a faulty connection in your signal board where the in jacks are at the back of the TV . Check to make sure cable from DVD are not bad, I have used cables before and got a false positive. Try turning and spinning the jacks once you have a picture.Make sure your signal board is firmly pressed into its slot on the signal board chassis. Thats it for now. Good luck.
This is not an adjustment. There are some components that have become thermo sensitive with age and use. The fault is in the vertical deflection circuit area. Very often it can be a number of electrolytic capacitors.
An experienced TV tech can service this for you. After the fix, the TV should work as normal.
Sounds like you've got a vertical deflection problem causing the shrunk picture and finally a solid bright line. As to the loss in brightness you may be losing screen voltage to your picture tube.
Probably it is time to shop for a new tv since cost of repairs may be too much.
another vert problem. The only way to fix this is replace the vert output IC and maybe a cap in the waveshaper that made the IC go bad. If you have no electronics experience then i would let a pro do the repair as it should cost more then 125 to 150 bucks or so. Good luck