LG 55uh661v flickering images and lines

[arctor]

Hi, I have this tv a LG 55UH661V that show flickering images and lines. I tried to take off one at time the right and the left ribbon cable and put the tape for ask the pin…but nothing working. Or I stop to have picture or still flickering. Someone can help me to understand what pin I have to mask? What I notice the buffering board, the flat cable becomes very hot, I don’t think it s normal, I’m talking about the orange flat cable soldering on the buffering board, both side are very hot. I give you the photo with both the ribbon cable on and a photo with the right off and with the lefts off can you please help me

[Davi.p]

It's oxydizing traces on both the cof tabs at the extreme of panel..

[arctor]

It's oxydizing traces on both the cof tabs at the extreme of panel..

i can't rapair it? there is no solution?

[Davi.p]

i do not know.. there is only one chance but i haven't tested it, don't ask me how... i broke my balls with tv for now..

[arctor]

i do not know.. there is only one chance but i haven't tested it, don't ask me how... i broke my balls with tv for now..

Ok thanks I ll wait if someone else want give me tips

[arctor]

nobody can help me?

[arctor]

Hi guy I’m not give up because the tv was working fine….i noticed a simil burned area in the end of the buffering board on the right side panel. I give you the photo. That area have 10 resistores from R2000 to R2009. They become very hot and you can see a brown color . They start to warm after some second the panel is on and then also the flat yellow cable start to bcecome hot. I tested all the capacitor and they are ok, I tested also the resistors and they are around 100 ohm so I think it s ok. Someone resistors near are like in short like 0,004 ohm but maybe they have low resistence I don’t know…I give you the photo with the values. I tested also the volts on vgh and I have +26,6 volts stable vgl2 -14,9 volts that don’t know if is ok. And the points near vgh and vgl2 go from +26,6 to -14,9 and I don’t know if it s normal. I give you the photo someone can help me, I saw some videos where people take off the resistors and the tv turn on normalupy can I do the same, or the problem is not fixable or the problem is somewhere else thanks

[lotas]

The problem is in the panel according to the CKV signals, check the resistance on these resistors from the panel side relative to the ground, if it is low, then remove these resistors and achieve a better image (before measuring the resistance, disconnect the bar from the T-CON).

[arctor]

The problem is in the panel according to the CKV signals, check the resistance on these resistors from the panel side relative to the ground, if it is low, then remove these resistors and achieve a better image (before measuring the resistance, disconnect the bar from the T-CON).

Thanks Iotas, I plug off the buffers bars, and I checked the resistors on the buffer board to the ground, but no one have low resistence if I disconnect both the side. With one side connect some resistence are like 17 ohm, they are the resistors who give me very low resistence but they don’t warm, the part that warm is on the end of the buffer board the 10 resistors.
but if I disconnect the other side the resistence to the ground goes around 300 kohm. This happen for both the side if I disconnect both side, both side didn’t have low resistence relative on the ground. If I disconnect one side at time, then the resistors who had low resistence, have 17 ohm on the ground.
I notice also the pack of 10 resistors on the end of the buffer board of the other side getting hot, not hot like the right side but also them getting warm. Do you think if I take off the resistor with low resistence it can help? Or I have to take off the pack of the 10 resistors? Or all is vain because it s completed death?. thanks always for your help

[lotas]

Yes, try to remove it from the beginning with less resistance on the ground, they can still short-circuit each other, check this too.

[lotas]

Thanks Iotas, I plug off the buffers bars, and I checked the resistors on the buffer board to the ground, but no one have low resistence if I disconnect both the side. With one side connect some resistence are like 17 ohm, they are the resistors who give me very low resistence but they don’t warm, the part that warm is on the end of the buffer board the 10 resistors.

Here I don’t understand, when you disconnect the buffer board from T-CON the resistance is high (large), and when you connect it to T-CON, the resistance decreases to 17 Ohm?

[arctor]

Here I don’t understand, when you disconnect the buffer board from T-CON the resistance is high (large), and when you connect it to T-CON, the resistance decreases to 17 Ohm?

Sorry Iotas, I try to explain better. The tv didn’t have tcon, but only the main board, I think the problem is on the right side where the pack of 10 resistors becomes very very hot. If I measure them I have 100 ohm each in both the buffer board on the left and right side. On the right side there are other resistors that give me like very low resistence I put the photo.
if I measure the resistors on the ground like you suggest, if I plug off only the right buffer board I have low resistence on that resistors that normally show me 0,004 ohm and on the ground I have 17 ohm and the multimeter beeeping. But if I plug off also the left side, so now I have all the two ribbon cable off , then if I check that resistors it give me kohm and no more 17 ohm like before….
The tv I think it s not fixable but I give a shot to take off that resistors and see. Hope I explain better thanks lotas for your help I ll try and let you know what happen if u have suggest just let me know

[Davi.p]

zero ohm resistors are normally at zero ohm.... 0,004 ohm?? what the hell of multimeter do you have?? A 400euro Fluke?
Is this tv set been stored for a long period in a moisture ambient (humidity)?

i report to the staff that in android phones and chrome in the messages list, the last post indication is missing of the author username..

[Diah]

don't miss with the panel.. show yours Mainboards high resolution focused photo from up and down side.... also inspect the 2 LVDS cabel from both side with good light source and magnifier

[Davi.p]

To convince yourself, get a can of compressed air and spray it upside down to the two heating cof tab, when very cold try turn on tv and notice differences in working..

[lotas]

A can of compressed air will not help (it is used to clean dust), for cooling you need the FREEZER Rapid Cooling Spray Aerosol.

[arctor]

don't miss with the panel.. show yours Mainboards high resolution focused photo from up and down side.... also inspect the 2 LVDS cabel from both side with good light source and magnifier

i give you the photo if you need better just tell me, the cable looks good good I tested with multimeter

[arctor]

A can of compressed air will not help (it is used to clean dust), for cooling you need the FREEZER Rapid Cooling Spray Aerosol.

What if I put some isopropyl alcohol? I don’t have freeze gas…

[Diah]

i give you the photo if you need better just tell me, the cable looks good good I tested with multimeter

still the downside of the boards you didnt posted photo of it,
under the speaker of the side which you wrote become hot, you have U ribbon cable on the buffer boards, disconnected and see if you have 3/4 stable picture

[Davi.p]

Compressed air upside down Is acceptable freezing Spray as well as butan gas..