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My lg tv 50PG20-UA has lost the picture completely but I have sound. how can I fix it?

Turned on and off many times only connected to a coaxial cable. sound is great but screen is totally blank

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You have a bad y main and maybe a bad buffer board. Need to have the buffers checked before replacing anything else.

Posted on Dec 09, 2014

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you are describing a power supply defect. IT may be as simple as the main fuse. I believe the one in this set is a 6.5 amp located on the ps board right by cord connection. IF after replacing the fuse opens a second time you will need to replace the power board.
p[lease leave feedback

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I had same problem - no picture, but sound worked - LG 42PC3d - was two months past warranty, but LG agreed to fix it as a warranty call. Service guy was out within a week to replace the Z SUS(?) board. Works fine now. This must be a typical problem, as LG did fix it, even though the warranty had expired. Good luck.

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1 Answer

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connect coaxial cable connector from your cable service company to cable box-----in jack.
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