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Sounds like panel fault. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Screen-shots do defective LCD panel are given. You can see and compare it to that of your TV's.
Try different source like VCR, DVD, or satellite to see if it is the source thats bad. Check to see all your connections are on good and tight. If still no luck, then your tele is fu.k.d and you got bad LCD crystals or faulty inverter. Take the thing back to the store for exchange or refund if your within your 30 day window. Call the manufacturer if your within your 1 year window.
sharp has a problem with this model-try to turn the contrast down to cover up
or you can contact sharp-good luck they will not support their own product
next time you buy a tv get the extended warranty-there is no more quality in todays tvs
sorry for the bad news
try to go to the factory reset and see if that helps. If not, you can then check your connection. if you use component (red, green and blue for video and red and white for audio), make sure all the color matches when you plug it in. if everything have been checked then you need to replace the main board and it should correct the problem.
If you have a thin line running down the screen, you may be looking at a service issue right off of the bat. Here is a few things I want you to try before calling sharp, 1. Reset the unit from the setup menu 2. Unplug the unit for 2 minutes then plug back in. If that does not work. Take digital pictures of the line and call sharp immediately. Make sure you tell the rep you want to sign up for the aquos advantage program that they have(extends your warranty 3 months free of charge!) because that will get you priority service on with your issue. If they cant resolve that line ,9 times out of 10 they will replace the unit. hope this helps you
Warranty still alive?
Hope so; the problem could be an expensive one.
The screen appearance is controlled by allowing light from a backlight through by turning pixels off and on.
This switching is done by a matrix that turns on vertical and horizontal pixels of the right shade at the right time to produce the image you see.
One of the control elements for the vertical that controls the transmission of green light from the backlight, has died (no longer switching off and on when told) and these are normally a part of the LCD screen assembly itself and not easily replaceable.
I would be talking to Sharp - this shouldn't happen in 6-7 months of use.