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Оригинальный сообщение: oldturkey03 ,

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Srikanth Vadlakonda it does sure sounds like your backlight is gone. From what it sounds like the battery somehow shorted out parts on your l;ogic board. It does not sounds like a new LCD would fix this, but anything is possible. It will be easier to exchange the LCD, but somehow I would think that this is a bad LED driver situation. Try a new LCD and see what happens but be prepared that it will not fix this issue. If you can, try to find any identifying marks on your motherboard so we can at least try and find you a schematic to help you out further.  Download the service manual [http://downloads.dell.com/manuals/all-products/esuprt_laptop/esuprt_latitude_laptop/latitude-e6420_owner%27s%20manual_en-us.pdf|from here] to help you with the LCD replacement

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