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I have sony bravia kvl40u100 it has sound no picture what could be wrong

It does have white light coming out back of tv i think its the t con board is this right

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  • Master
  • 933 Answers

If there is white light coming out of the back of the set, it sounds like the inverters are firing and your backlights are working. Is the screen pitch black? Gray? White? Blue? It could be a defective T-Con, main board, faulty power supply rail, or in rare cases, a faulty LCD panel.

Posted on Jan 06, 2013

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Posted on Jan 02, 2017

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dsacco86
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SOURCE: my sony bravia tv is flashing red stand by light

Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you flashing red light codes, circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Posted on Jun 29, 2009

vinnyq
  • 157 Answers

SOURCE: sony bravia kdl-52w3000, turn tv on, no picture or

Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.

To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).

Posted on Oct 07, 2009

  • 28 Answers

SOURCE: Sony Bravia with really bad ghosting

The little board on top attached to panel.

Posted on Jul 05, 2010

  • 115 Answers

SOURCE: Left half of my TV screen is completely white

That is only available to Sony authorized servicers. See esupport.sony.com

Posted on Jul 31, 2010

  • 1 Answer

SOURCE: sony bravia kdl 46s4100 no picture

it sounds like your back light might be going out. You might be able to fix this by installing a new backlight inverter board.

Posted on Aug 05, 2010

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Contact the authorized service center for Sony. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

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