Question about Sony BRAVIA KDL-40V3000 Television

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"Upgrade" of Backlight Panel

For a Sony KLV-32S310A, is a backlight panel "upgrade" possible? If the backlight inverter or backlight "power supply" has failed, should only the backlight "power supply" or backlight inverter be replaced? If the problem is the bad lamp(s), should the bad lamp(s) be replaced only? OR should the whole backlight panel be replaced? OR should the Bravia unit be replaced already?

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  • 58 Answers

Just replace what failed.
I replace the surface mount FETs on the inverters.

Posted on Dec 06, 2008

  • thesteve42 Dec 06, 2008

    just replace what failed.

    I replace the surface mount FETs on the inverters.

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Screen is black, no picture sound is O.K


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/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.
Type in the brand name and type of your device, in the search box [at the top right] of the display window; to gather down all the posts related to your device brand. It will make surf easy.

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1 Answer

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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/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.

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T'Con board fault. In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel.If so, they can't be replaced.In this case; a panel replacement is the only repair.For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS].To such sets, the power supply section circuit too should be troubles hooted.Contact any service technician.The circuit will differ with models and versions.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts.It will make surf easy.

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It sounds that the back-light inverter has the fault. If there is any winding short [cannot detected by measuring with an Ohmmeter], this type of fault can occur. The only thing to do is replace the back-light inverter board. The LED blinks indicates a short circuit .

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1 Answer

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Click here to find the backlight inverter board.
Let me know if you need further assistance. I repair power supplies for all LCD models.

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1 Answer

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