I believe the replacement T-CON (which was used) is partially faulty and was sending a “noisy” signal to the right side of the panel, causing the purple and green vertical lines (even if they were not clearly visible in the previous photo). With the original T-CON back...
dariuxzy
Senior Member
Last Activity: 07-08-2026, 06:53 AM
Joined: 03-17-2023
Location: milan
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It actually resolved itself! That half of the screen slowly stabilized after about 4 hours. At first I also thought the capacitor I installed might have been the wrong value, but right after I reinstalled my original T-CON I already noticed a slight improvement. So I decided to wait, and now the TV image is perfect.
I believe the replacement T-CON (which was used) is partially faulty and was sending a “noisy” signal to the right side of the panel, causing the purple and green vertical lines (even if they were not clearly visible in the previous photo). With the original T-CON back... -
Good news! The replacement T-CON arrived and I tested it, but nothing changed — actually, additional purple and green vertical lines appeared. Then I remembered the first capacitor that was shorted and that I had previously removed, leaving that spot empty. I decided to put a good capacitor in that position, and now the image finally appears!
However, as you can see, there are still purple and green vertical lines overlaid on the image.
At first I thought it might be the new T-CON, but the exact same behavior occurs with the old T-CON as well.
What could be causing t...Leave a comment:
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Do you mean the R2 part? It's really weird. If you have any other ideas, even dangerous ones, don't worry. I can try them. If I have to throw it away, it's worth trying everything.
Anyway, I ordered a new t-con a week ago. It should arrive today, so I'll keep you updated, I'll try this other attempt...Leave a comment:
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I know, I just wanted to say that I also did this other test
The TV didn't hit anything, the glass is perfect, there's not much to report, out of nowhere it was completely gone, black screen and backlight on, that's all.
I also wanted to share a photo of the upper part of the bad side, as you can see in that top half, the image is visible but it's noisy. (I hadn't noticed it before because the TV was on a table and that part was covered)...Leave a comment:
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Yes
Yes
There is continuity in all the pins of the flat, I also changed the flat with the one on the left, but still the same result
No
I don't have an oscilloscope, anyway these are the measurements of those resistors
R134 56,3 ohm
R110 56,2 ohm
R120 56,0 ohm
R121 56,2 ohm
R124 56,2 ohm
R126 56,2 ohm
R120 56,2 ohm
R130 56,1 ohm
R132 56,3 ohm
R136 56,3 ohm...Leave a comment:
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I tried to block with the tape all six CLCKxR lines as well as STVR, but there was absolutely no change in the image, still black and white stripes...
(one additional detail i never mentioned: the vertical stripes are not fixed, they change and move depending on the image content that should be displayed)...Leave a comment:
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Oh right, sorry. There are CLCK1R, CLCK2R, CLCK3R, CLCK4R, CLCK5R, CLCK6R, do I have to put the tape on all of them or one by one?...Leave a comment:
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How do I find the CLCKxR or the STVR in the flat?...Leave a comment:
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Ok, now I understand everything perfectly. I did the test and I can confirm that there is continuity between the panel board connector and the T-CON for both DVDD1V8 and DVDD3V3.
Measured voltages under operation are:
DVDD1V8 = 1.78V
DVDD3V3 = 3.29V
Thanks for you time...Leave a comment:
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Sorry, but I can't find it or I don't understand where it is. Could you help me with the photo I sent in the previous post? Thanks a lot...Leave a comment:
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Yes, VGL is negative, I previously forgot the -
The RGB test was only appearing because the T-CON to main board connector was not fully seated. Once reconnected properly, the RGB test no longer shows and the TV boots normally and the good side of the panel works perfectly.
Honestly, I can’t find where the pin VCC is routed toward the COF on the faulty side.
I’ve attached three close up photos of the R1 section on the faulty side.
Could you give me a tip to find it? Thanks always!...Leave a comment:
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R1
VCOM 7,70V
ADVV 17,48V
HAVDD 8,40V
DVDD1V8 1,770V
VTERM 1,039V
R2
DVD1V8 1,761V
VTERM 1,025V
HAVDD 8,37V
AVDD 17,48V
VCOM 7,72V
VCOMR1 7,72V
VCOMR2 7,72V
VSSR 7,10V
VGL, VGH and DVDD3V3 are only on the tcon with these measurements:
DVDD3V3 3,29V
VGH 34V
VGL 7,97V...Leave a comment:
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So what would be the next step to understand why that part of the screen has those black and white stripes?...Leave a comment:
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These are the measurements of the "shorted" capacitors with the board connected to the t con (before I had done the measurement in diode mode)
C124 08,2 ohm
C123 07,6 ohm
C122 06,9 ohm...Leave a comment:
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I tried that test and it doesn’t seem like any capacitor is heating up, which is quite strange. I also performed another check: I measured the same capacitors that appear shorted on the right R1 section, but on the other (working) side of the panel, meaning the left R1 section.
Interestingly, those capacitors also appear shorted when the board is connected to the T-CON, yet that half of the screen works perfectly with no visual issues....Leave a comment:
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Sorry, I got confused... actually the faulty side is the right one, not the left one... the TV is placed upside down on the table, so the faulty side appears to be the left one, but in reality it's the right one... does this make any difference? Can I still do this test?
sorry for the confusion
Anyway it seems strange to me too, but can't it be that it's just a problem with the right channel of the T-CON, given that if I connect the left channel works perfectly?...Leave a comment:
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Don't worry, thanks again for your time and help!
One thing, can you explain to me better how to inject current into the avdd output on the tcon to find the broken cap? Thanks a lot.
The tcon is this...Leave a comment:
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Let me explain it better.
I noticed that on the same “bad” left panel board, but on the R1 section and not on R2 (R2 is where the first shorted capacitors I found were located), there are three other smaller capacitors that also read as shorted.
I had attached a photo with those capacitors circled in a previous post, although it might not have been very clear.
However, I then noticed that the short does not originate from the panel board itself, because as soon as I disconnect the flat cable from the T-CON to the left panel board, the short on those capacitors disappe...Leave a comment:
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UPDATE Davi.p I found three more shorted capacitors on the same bad side, but on R1, not R2. I'll let you know as soon as I find the shorted capacitor
C122
C123
C124...Leave a comment:
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These are all the measurements of those resistors or varistors I circled:
R137 2,360 R133 2,418
R131 2,408
R129 2,128
R127 2,184
R125 2,182
R123 2,191
R121 2,188
R119 2,179
R135 2,392
(All measurements are in MΩ)
Yes!...Leave a comment:
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