Samsung QN50Q60t lines on screen

[jeyoung12]

Hi all
I have lines on the screen...which is an age old problem that can be remedied by watching Youtube videos and getting out the tape.
My issue (after successfully fixing a different sammy tv with a separate tcon board and isolating the side of the panel...):

This tv has an integrated tcon...so it is a bit more confusing when trying to isolate the clocks.
It has a c ribbon and i have taken each end out to see if that will isolate the lines. instead, it makes it much worse ALL over the tv!

So....i don't know what end of the C ribbon to work with and the lines on the tv (one big one through the middle of the screen horizontally, some shorter lines horizontally on one side, and one vertical line.

I will post a picture of the screen tonight when I am home.

I was confident I could fix the horizontal lines with tape...but where to begin...how to isolate?!

I appreciate the challenge and hope to hear from any knowledgeable users. Again, the integrated tcon makes it for some reason more tricky...or the fact that I can't remove one side of that C ribbon and see a perfect picture on one side of the tv has me a bit confused/nervous that it is beyond the tape fix.

any help appreciated

JY

[viking6791]

Hi jeyoung, in last 3 months I tried to bring back to life 3 Samsung models, TU series, MU and QE50Q. The first results were disappointing but I persevered, having time and study material (of course the videos on YouTube were also helpful) I managed to repair several devices from these series with surprising results. I don't know if they will last over time, but the owners of those devices are satisfied that they don't throw them away after 3 years of use. Send me pictures of the two boards that are attached to the display and the motherboard, or post them here and I'll try to guide you to a solution.

PS. All the respective devices entered the loop at start-up, with or without the logo.

[jeyoung12]

Thank you very much! Here are the photos of the back of the tv. You will see the integrated tcon C ribbon…and I attempted to zoom in on the clock board on the far left of the panel along the bottom. I am guessing that schematic is attached to the c ribbon…
i added the other boards just to show you whats what

thank you for your help!

i will note that the tv starts up fine, no boot loop that i know of

jy

[viking6791]

Hello again, The T-con is integrated on the motherboard, to identify which part of the display is the problem, you must disconnect the ribbon that connects the two boards attached to the display (marked ST5461D11), the right side as you look at the display, see the attached picture .
Your TV will not work without the connection between the two boards attached to the panel, and in order for it to work, a connection must be made between two test points on the main board, see the second attached picture. If the image is clear on the left side of the display as seen from behind the TV, it means that the defect is on the opposite side.
In picture 3, the circled area contains the signals that you must find on both boards, the voltages VGH and VGL must also be identified. I will come back with details after you take the test above.

[jeyoung12]

Wow! Amazing help...and a much different process than when the tcon is a separate board (which is a lot simpler and well documented everywhere!). I attempted to look and read about working with an integrated tcon board all over the net...and came up with nothing. ..so your info is extremely valuable (and rare!). I hope others find this and can use it, too!

Ok, so remove the C ribbon right side (thanks for the clear instructions in the pic). Then I need to make a connection between the two test points on the main board.

My question is: how do i bridge these two test points on the main board? a wire of some sort between the two points just touching the board? sorry if that is an obvious question but any info here would be greatly appreciated!

I will inch my way forward and isolate the side of the panel and come back to you.

Thank you again for your patience and knowledge!

JY

[viking6791]

(My question is: how do i bridge these two test points on the main board? a wire of some sort between the two points just touching the board? sorry if that is an obvious question but any info here would be greatly appreciated!)
You must use a wire to bridge this two points! The next picture is more relevant!

[viking6791]

Most technicians who repair TVs do not want to reveal these small discoveries because they imagine that some person enters such a forum and everything falls apart and he loses his job! It's a false approach, I learned everything thanks to some people who passed the information on and I will pass it on because I have to do this, like, send a file and I'll help you modify that file so it works for you device. I learned to repair from books published on paper, not from forums.

Be a teacher and teach others to be at the same level as you!

[jeyoung12]

yes, and the power of the internet to communicate or find info (help each other basically) is the way the world is heading! I appreciate your help and will pass it on, too. I like the idea of not filling the landfill with useful stuff. And, to stop being so materialistic!
Looks like you soldered the wire on, correct?
And any small gauge wire should work?