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Hi, To reset the tv to factory/ default settings, please follow below procedure. Turn On the TV, while holding down Up Arrow on the remote control, press Power button on TV, tv will turn itself Off then back On again, release Up Arrow on remote control. This procedure will reset all settings in tv to default settings. Problem seems with lcd panel and I'm afraid it does not seems to get solved by resetting tv however try to reset tv by above said procedure. Thanks.
The tv have a long board that call the LCD inverter board it is dead.This long LCD inverter board only job are to provided a backlight for the tv LCD screen panel to produce a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board for the replacement.
usually you can correct this issue with only a few system checks, dark streaks can be caused by damaged pixels on the screen, in which case you need to replace the TV.
Inspect where the dark streaks are on the television. If the streaks occur at the same place on the top and bottom of the screen, they are due to the formatting of a movie or television show you are watching. This is normal. Also, if the streaks appear on the left and right of the screen, they are due to the show being filmed in full-screen instead of wide-screen. This also is normal.
Change the input setting so you are viewing the contents of a different device. If the dark streaks are gone, you know they are due to the device connected to it. However, if the dark streaks remains no matter what input the TV is connected to, the problem lies with the television.
Inspect the cable connection. Oftentimes when connecting a computer to an LCD TV, you can have strange dark streaks across the screen. Use a DVI-to-HDMI cable connection when plugging in your computer, then press the "Menu" button on your TV remote, select "Picture" and chose "Square Pixel." See whether the image adjusts and the dark streak goes away.
Contact the manufacturer of your LCD television if the dark streak remains. This streak can be caused by a defect in the television; if the TV is still under warranty, you can have it replaced.