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How can I fix me tv

No power no pic on the screen

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TV electronics are complicated and if you do not have a circuit diagram for your model TV or electronic training then you need an electronic TV repair man/shop to repair your TV.

Posted on Nov 30, 2012

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Posted on Jan 02, 2017

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Connected to cable box sound no picture reboot left tv on 3 hrs. fine. turned off. 2 hours later turned on now no pic just sound. When the tv is cold no pic. when warm pic. ???


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Check and replace damaged component/s at the main power supply regulator section.

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Sanyo dp42849 picture is slow


Back - light problem. 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. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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Hello,
This problem is caused by a faulty Convergence amp. This amp keeps all three colors aligned together and square on the screen. It could also be the power supply section that supplies power to this amp.
A local TV shop should be able to repair this for you for about $350

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Is the battery low? It takes more power to take images than to review them.

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It is hopeless, the new screen will cost as much as a new TV. Bummer.

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