So i have been watching a lot of those panel repair videos. Not the one with the bypass method cutting the CKV lines but the videos where a voltage is missing to one of the side COF IC's. This is what happened...
I got in a Telefunken 32" LED TV, when you start up the set the Telefunken logo comes up but soon fades to blue, the whole screen becomes the faded washed out blue. The corners of the LED panel also have black corners. It almost looks like water got into the set but this is not so.
I got the set in the service position. (turned the panel upside down so that i can get to the side COF IC's test points) Connected the LVDS cable to the mother board and then scratched off the insulation on the test point of the COF IC's so that Ii can take measurements.
Now I already googled the COF IC's test points voltages so i knew what to expect.
Switched on and took measurements, I noticed the VGH reading was measuring -8V DC. Took my magnifying glass and inspected the circuit that is inside the glass that goes from the side cof down the side to the bottom COF IC's and behold that circuit was open circuit. I could see little splotches. I dont know how to explain it better but the conductive material had disappeared in several places. So i had to put in a wire. I quickly soldered a super thin wire onto the pad of the side COF IC and supported it with sticky tape glueing it to the glass leading to the bottom and soldered the other side to the VGH test point on the scalar board (Board at the bottom of the screen that is attached with the COF IC's). I reassembled the unit and powered up the set. Voila, 100% image. We went from a scrap set to a profitable repair.
And do you know how many sets like these I have returned or thrown away, plenty..... this is a common problem
Perhaps this helps someone in this forum.
If you have any questions just holler.
I got in a Telefunken 32" LED TV, when you start up the set the Telefunken logo comes up but soon fades to blue, the whole screen becomes the faded washed out blue. The corners of the LED panel also have black corners. It almost looks like water got into the set but this is not so.
I got the set in the service position. (turned the panel upside down so that i can get to the side COF IC's test points) Connected the LVDS cable to the mother board and then scratched off the insulation on the test point of the COF IC's so that Ii can take measurements.
Now I already googled the COF IC's test points voltages so i knew what to expect.
Switched on and took measurements, I noticed the VGH reading was measuring -8V DC. Took my magnifying glass and inspected the circuit that is inside the glass that goes from the side cof down the side to the bottom COF IC's and behold that circuit was open circuit. I could see little splotches. I dont know how to explain it better but the conductive material had disappeared in several places. So i had to put in a wire. I quickly soldered a super thin wire onto the pad of the side COF IC and supported it with sticky tape glueing it to the glass leading to the bottom and soldered the other side to the VGH test point on the scalar board (Board at the bottom of the screen that is attached with the COF IC's). I reassembled the unit and powered up the set. Voila, 100% image. We went from a scrap set to a profitable repair.
And do you know how many sets like these I have returned or thrown away, plenty..... this is a common problem
Perhaps this helps someone in this forum.
If you have any questions just holler.
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