Hi guys
I just started fixing 4k TV few months ago. so I am still learning a lot
I got this tv from friend complaint is ghosting or horizontal lines on image.
never saw the original symptom but I took the tv back home. the funny part is that after bringing to home, the tv worked fine no issue for 3 weeks.
then it started to show the ghosting white image.
I started using the tape method, but this tv does not have a T con board and it has only 1 ribbon cable from main board to the tv panel.
it has 3 thin small boards at the bottom of the tv. connected by 2 C shape ribbon cables.
I used this to separate the left side and right side of the tv.
if I disconnected the C shape ribbon cable either side, there are no image showing. using the test point I was able to find the pins for clock signals CK1 to CK8
when I taped the left side looking at the rear of the tv, the ghosting is there. if I taped the right side of the C shape ribbon covering the CK1 to CK8 the ghosting is gone but I got horizontal lines at the 1/4 bottom section of the tv. see photo 1
I was able to remove most of the tapes but only CK7 to get very good image most of the horizontal lines were gone but there is one horizontal line across the TV. it seems it is not completed dead line. it changes color depend the image. photo 2 and 3
so my questions is, this has to be the panel issue right? I dont think is either the main board. or cable can cause 1 line?
appreciated for any help
I just started fixing 4k TV few months ago. so I am still learning a lot
I got this tv from friend complaint is ghosting or horizontal lines on image.
never saw the original symptom but I took the tv back home. the funny part is that after bringing to home, the tv worked fine no issue for 3 weeks.
then it started to show the ghosting white image.
I started using the tape method, but this tv does not have a T con board and it has only 1 ribbon cable from main board to the tv panel.
it has 3 thin small boards at the bottom of the tv. connected by 2 C shape ribbon cables.
I used this to separate the left side and right side of the tv.
if I disconnected the C shape ribbon cable either side, there are no image showing. using the test point I was able to find the pins for clock signals CK1 to CK8
when I taped the left side looking at the rear of the tv, the ghosting is there. if I taped the right side of the C shape ribbon covering the CK1 to CK8 the ghosting is gone but I got horizontal lines at the 1/4 bottom section of the tv. see photo 1
I was able to remove most of the tapes but only CK7 to get very good image most of the horizontal lines were gone but there is one horizontal line across the TV. it seems it is not completed dead line. it changes color depend the image. photo 2 and 3
so my questions is, this has to be the panel issue right? I dont think is either the main board. or cable can cause 1 line?
appreciated for any help
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