Question about Sony Bravia KDL-40V4100 40 in. LCD HDTV

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How can I fix this issue. TV Symptoms: Picture Solarization - Now Black Screen

After taking the back panel off to inspect the T-con board and its wires due to Picture Solarization - I notice the wires were loose so I began to correct the issue. While doing so the screen went black and I am unable to view anything on the tv at the moment. The menu does not display nor are they any icons or pictures when powered on. There are no blinking red lights when the power is on. When using the menu button I notice that the screen lights up a little but not much like its in menu mode. I can only assume this might be some bad wires or TCON board but not sure. Please help would love to fix the issue myself instead of buying a new TV. I did not test the sound at this point because I am not able to see where i am on the tv to turn my apple tv on.

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  • Sony Master
  • 76,171 Answers

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.
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Dec 11, 2015

Testimonial: "Fixed for $105 and a technician, short chip on the main board, also chip on tcon board was bad, replaced and tv is running like new."


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6ya staff

  • 2 Answers


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Posted on Jan 02, 2017


Chi Chu

  • 8457 Answers

SOURCE: Power on - Screen Black non responsive

U might get the tv working again,by unpluging it,replug an hour later let the tv reset it self.Not,Than the Tuner board,it the board u should looking into replacing.Not the power supply board is good,because u getting a solid power LED indicator light.

Posted on Apr 26, 2010

SOURCE: Sony KDL-46V3000 Bravia LCD Black screen

It's not to complicated, in the newer TVs as well as other things, when you first turn them on the diagnostic circuits kick in [that the first relay you hear click] it sends a signal (low voltage) to all the circuits to check them and make sure there are no problems. If it gets the proper returns from each circuit it kicks out and the full power relay kicks in and powers your set up. This is done to protect others circuits that might be effected by a flaw in a different circuit. What started as a small flaw in a component has gotten worse with use which is normal. Your set is kicking the diagnostic circuits and they are detecting the problem and shutting it down. You have problems with your power board, if the diagnostics circuits were not in place and full power hit the set the power board could possibly put triple or more voltage to some section of another board, thus burning it out also. That's why they started using the diagnostic circuits on TVs, Computers have had them for years. Late model car - etc. I would take the power board out of it and go to shop Jimmy's and enter the part # which will be on the board and order me another one and pop it in and kick back and watch TV again. I don't know what a power board would cost for it but "shopjimmy's" carries high quality boards at a reasonable price. I do caution you on buying a refurbished board, they are tempting but I have never and I mean never seen one hold up very long. As a matter of fact I will not put one into a TV or anything else for that matter. So there is light at the end of the tunnel and it's not the train this time! I only work on the kind of TV that plug into the wall or run on batteries, therefore, I've seen a bunch of them in14 years. Don't worry about getting the wires mixed up because one thing about TVs is a harness or plug will only fit one place and that is where it belogs you can't cross them up.

Posted on Oct 23, 2012

Fahr Quad

  • 736 Answers

SOURCE: Tv powers on, but shows a black screen. There is no audio as well. When the problem occurred, the blinking lights meant that there was a power surge of some kind. If I remember correctly that's what

Here is the customer support contact.

Posted on Sep 21, 2014

Testimonial: "yea, no thanks... I already talked to Sony. They were not helpful. At all."


The Knight

  • 76171 Answers

SOURCE: Tcon issue?

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.
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.

Posted on Jun 02, 2015

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1 Answer

When my TV have no logo when i turn it on. I changed the power board and the main board already. The problem still there. I bought a bad main board? Or I need to change my T con board too?

T con board responsible for final picture on screen of set. And visible distortions are caused by it. The inverter board powers the back lighting so you can see the picture. If screen is totally black that could be the issue.

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Ask them to replace the t-con board. It could be a defect one.Good Luck.


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Recently the picture became dark and heavily tinted with a reddish-brown color, how can I fix it?

Andy there are usually two inverter/backlight boards (usually on each side of the TV ) (inside the back cover). Most have Ribbon cables attached and lead to the screen. might try those. most of the T-con , inverter boards cost nearly the same.(according to the make and model of TV u have) even at $35 each it is still better that buying new TV .

Jan 27, 2015 | Sony Televison & Video

1 Answer


In what way is the screen broken? cracked, distorted picture, no picture but has sound?

If it is cracked. Replacement of screen is expensive. Cheaper to buy a new TV.
If Distorted. Parts linked to the screen can be the culprit. Most common part to fail is the T-con board. Main board may not be sending signal to the T-con board.
If its no picture but has sound. Back lighting has failed which could be several things that can cause that.

without any other details besides "broken" it will be hard for someone to help with diagnosing your problem. We need symptoms like. has sound but no picture. Picture has horizontal or vertical lines. part or half of the screen is black, black borders don't count. Hope the info here has, in some way, helped bring you closer to what to do with your TV.

Mar 26, 2014 | Toshiba 32L1300U 32" LED TV 1280x720, 120...

2 Answers

Screen right side is black for 40"sony lcd tv


This kind of symptoms is an indication of faulty T-con board. This board has a connector to the main board and to the panel. These connectors must be pull-out, inspect, and then re-insert and ensure that they are properly seat-in to isolate loose connection from fault. If the symptoms still persist, you have to replace this board to resolve the problem.

Opening the back cover will void the warranty. If your unit is still under warranty period, avail it because the manufacturer will fix it fro free.

Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Aug 19, 2011 | Televison & Video

4 Answers

Half screen is blank 42lg20 or 42lg50 when

This is likely to be the T-con board. If the entire screen glows but you have no picture on the second half of the screen then it is the main board, not the backlight inverter. If the screen is half picture and half gray it is the T-con board.

Replacement of one of the above will fix the issue.

Please rate if this helped :)

Mar 07, 2011 | LG 42LC2D 42 in. LCD HDTV

1 Answer

When I turn on the set, the right half of the screen is distorted. It flickers, different colors move from center to far right of screen, double images that appear as negitives and sometimes that half of...

Symptom shows problem with lcd panel (screen) however, t-con board that is part of lcd panel could be defective and cause of these symptoms.
T-Con board is located at top center of cld panel at rear and would be covered with metal shield. There are three type of t-con board utilized according to lcd panel and are available in
Please check what t- con board is similar with your tv board to order it. If you are not handy with electronics stuff repair then local tv repairman will help you to replace t-con board that might solve your tv picture problem.

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