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Question

Samsung smart TV lcd problem

by Bram1466 / November 17, 2015 12:51 PM PST

Hi guys,
I've got a problem with my Samsung ue55es6530 55 inch smart tv. I've been searching on the internet for a couple of hours and I expect my TCON board is broken, but I'm not sure yet. It seems to be impossible to find someone else with the same problem as I've got, so I decided to ask you.

The following picture is a picture on my laptop screen connected to the TV.
http://i.imgur.com/XIODMrR.jpg?1

And this is the one displayed on the TV (upside down)
http://i.imgur.com/pRleNUQ.jpg?1

It seems like the right part of the tv is functioning normally, while the left part is losing colors as you look more to the left, untill it's almost black and white at the end. When playing a movie, at the most left part of the screen images fade away very slowly, which results in a shady movie.

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All Answers

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Answer
Why did you think it's the TCON?
by R. Proffitt Forum moderator / November 17, 2015 1:38 PM PST

That part is near legend or folklore on the web. After all those posts why should I talk you out of it being one of the TCONs?

To me it looks like a backlight failure. I don't have a video for this LED model but here's what you see when the backlight fails on CCFL backlights. https://www.youtube.com/watch?v=oE6K4xBVweA

This is not considered user serviceable for many reasons. Since there are lethal voltages inside and more, I usually try the old unplug and plug in all the connections then write it off as BER.

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Why i did think it's the tcon
by Bram1466 / November 17, 2015 1:52 PM PST

I think it is the TCON, because the problem occurs at excactly the centre of the screen and influences the entire left half of the screen. I also found some video examples of a backlight failure, but in those occasions there was like 1 big almost black vertical line somewhere in the screen. But the shady movements I talked about also occured on these video examples.

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Why i did think it's the tcon
by Bram1466 / November 17, 2015 1:52 PM PST

I think it is the TCON, because the problem occurs at excactly the centre of the screen and influences the entire left half of the screen. I also found some video examples of a backlight failure, but in those occasions there was like 1 big almost black vertical line somewhere in the screen. But the shady movements I talked about also occured on these video examples.

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Then make a choice.
by R. Proffitt Forum moderator / November 17, 2015 1:59 PM PST

There is something missing from my reply. I forgot to tell you to try to get the service manual (www.samsungparts.com) Techs don't work on sets without those unless they accept the guess.

The pictures only show me what I find to be backlight fails.

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An additional foto
by Bram1466 / November 18, 2015 9:08 AM PST
In reply to: Then make a choice.
http://i.imgur.com/eCrHz4h.jpg?1

I've uploaded this additional photo which i hope will clarify my problem. The grey squares on the background are supposed to be the same color. I hope someone can still confirm this is definitely a backlight fail.
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To me given the pictures and story, I agree.
by R. Proffitt Forum moderator / November 18, 2015 9:22 AM PST
In reply to: An additional foto

But to get down to it I'd have to open it up and use the service manual and my background in electronics design (yes, I can be over qualified at times) to see if the LED drives are too high/low compared to others. But sometimes they bury these deep inside the panel so you're never sure if it's repairable. Did you try the old tech trick of wiggling? I shared a video about that above.

Remember I accept you know the deadly risks and are a TV or electronics tech.

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Led drivers
by Bram1466 / November 18, 2015 10:50 AM PST

Thank you for your reply, but the led drivers are located 'in the screen' or at least 1 level closer to the screen than the power board, tcon board and video board. The only thing I can see is the power lines of the led drivers running through a hole in the backcover of the screen. I tried wiggling them and reconnected the connector a couple of times without results. I prefer to not open the backcover, because everything is clicked together very tight, but if the problem can be eliminated to the led drivers, I will open it.

I also noticed that when a bright white line on the left part of the screen should rapidly disappear, the line actually fades away very slowly (takes about 2 or 3 seconds).

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Then it's up to the tech to decide the next move.
by R. Proffitt Forum moderator / November 18, 2015 11:49 AM PST
In reply to: Led drivers

As in what parts to swap next. My time in shops was helpful as an older tech shared golden advice on that. It was:

"When in doubt, replace the cheapest part first."

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Answer
answer
by Uday_S / November 22, 2015 5:57 AM PST

You can perform picture test on the TV through Menu > Support > Self Diagnosis > Picture test.
If you find the same issue on picture test . something's wrong in the TV.

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Answer
Measured the power lines
by Bram1466 / November 23, 2015 10:54 AM PST

Hi again everyone,
After measuring the power lines running from the power board to the led drivers (as I explained before) I don't know what to do anymore. These power lines are connected to 2 identical connectors on the power board, but the colors of the wires suggest they are mirrored. So I took my multimeter and started measuring the voltage over the ground and the pins on the connector (dicrect current), while the connector was connected and the backlight was on. I wasn't able to find a pattern in the voltage on the left side connector and the one on the right. As the most technicians would do, this is the moment I tried to find the technical data of the power board (PD55B1QE_CDY). Unfortunately I couldn't find it and I'm running out of options. Help me please...

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You are missing the point(!)
by Pepe7 / November 23, 2015 12:58 PM PST

At this stage, you wave the white flag and call the trained technician for as service appointment.
It is necessary to open up your wallet, amigo. We don't provide that level of (truly, inside) technical detail here in this type of general forum.

Good luck.

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