Question about Vizio VO42L 42 in. LCD TV

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Vizio M421vt no picture

No picture

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If audio is OK, the fault should be with its backplight inverter baord. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Posted on Apr 22, 2014

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Fault at its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Here is what I would do. Do a google search with the model of the TV with a short description of the problem and hopefully it will lead you to a solution. Unfortunately repairing these TVs that can be bought new for less than 400 dollars is usually not cost effective.

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