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Repair guides and support for televisions manufactured by Sony.

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Possible Dead T con board? or is it the Screen?

Hey Guys,

I have a KDL-46W5500 Sony Bravia which has just decided to turn on with lines appearing 10 seconds after power on

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.

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After some investigation I decided to take the back off and try taking out / putting back in the T Con Board inputs and strips/connectors

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but to no avail.

I am considering purchasing a new one off Ebay for about $80, but wanted to know if any of you fine gentlemen could advise if you believe replacing the T con board would actually solve my problems or whether you believe it to be the LCD Screen itself.

I did try powering on the tv without the T con connected and the lines didn't appear so I think that is maybe a tick on the replace the t con board list. Any help would be much appreciated. other photos of tv components:

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Thanks,

Joel

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I guess its not the Tcon , but the main-board flash ic problem issue. check whether the 5.5 v mosfet is overheating by touching it.

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Hey I probably should have posted earlier. Replaced the main board and after that didn't work, I figured it was the panel and just sucked it up and bought a new TV.

Good news is now I have 2 main boards that I don't need...

Thanks for all the help from the people on this board, I really appreciated it.

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@joel_h this does not look like a typical T-con board error. This appears more of a video processor error and could originate on your main board. Check that board and see if you notice any obvious damage and check all your cables to ensure they are not tore and are properly seated. After that I'd start by replacing the main board (get it from a place where you can return it in case it is not the fault)

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Thanks OldTurkey,

I'll check back in once I have had a look at the main board.

Cheers,

Joel

So I have taken a look at the board (my extent of this is literally looking at it) and tried re-seating everything on it. issues is still persisting and I have no way of knowing what is causing the issue.

my only other information is that it appears I have horizontal lines as well as vertical lines, but I doubt this points to anything else?

Is there anything I can do to narrow down the culprit before changing out hardware? (I'm in Australia and anything I can source will not likely be returnable) Thanks again for your help mate.

Joel

There is one point that has not come up before not is it visible on your pictures. " I have horizontal lines" is usually an indication that the panel as failed. Horizontal lines are never caused by a bad T-con board. Let me see if this is a common error for your model.

what I meant by horizontal is that you can see black horizontal lines. (so the vertical lines aren't actually fully red, they have black lines in them. What I am talking about is visible in the pictures, so if you think I meant actual colored horizontal lines, that's not what I meant.) hopefully that makes sense.

the only other thing I am worried about is that it might be the vertical bands. (the ribbon cable strips on the front of the TV) However, I haven't taken the metal exterior off to check these. Do you think this may be the cause?

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Yes replace tcon board and it should solve your problem.

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I have sony 40 inch led tv but that tvs t con board has damase can I use a 46inch tvs tcon

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%#*@, just this evening my LG LED TV turned black screen. The sound goes on but the screen is black. But in the dark of the room I see flashes of TV light go on and off at intervals.

I wonder if I have a tcon problem or the main board problem. Who has a lead? Thanks

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check the smps and led driver voltages

nope - its back lights thats bad, do the flashlight test to confirm . get room as dark as possible , with set on and audio press menu button and hold flashlighgt @ 4 to 6 inches away and amid where the menu normally appears. if you can read the words of menu , your problem is diffidently bad led(s) inside the screen . a lot of manufactures uses cheap cheap LEDS most failures happen @ year number 3 , I seen them fail within the first 6 months. One thing you can do to prolong your leds from failing is to lower BACK LIGHT setting , I usually go 40 to 50 % lower it reduces current to leds which will not stressed them as hard. Think of it as a dimmer control. notice price of TVs going down, but never ask why? Its bc they putting cheaper parts and finding cheaper labor > have you EVER head the word QUALITY in ANY commercial selling TVs? Some TVs are refer to POS because if you ever open one up to work on it, its a joke how it was made. TVs use to get past down to the next generation, instead to the landfill.

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Tcon board is your best bet.

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