This SONY 32-inch LCD TV had vertical lines during the three-year screen warranty period. At that time, I thought it was a screen issue and advised the customer to contact the after-sales service for free repair and screen replacement. Some time later, the customer mentioned that the TV was shaking up and down. They called in a cable TV technician who also blamed the TV. The customer then asked me to come for a check. After inspecting the screen, I again concluded it was a screen problem and took it back to the store for further testing. In previous similar cases, I found that the screen had an independent logic board connected via a cable to the side board. Additionally, there were separate ICs on both the left and right sides of the screen. If one side had an issue, removing the corresponding IC from the other side usually fixed the problem. However, when I opened this particular TV's screen, I discovered that the logic board was integrated with the side board, and there were no separate ICs on the left or right. Instead, the ICs were directly bonded to the glass. This meant the screen couldn’t be repaired—it had to be replaced. But the customer insisted on sending it back to me. A few days ago, I came across a post online that described a similar fix. It sparked my interest, so I decided to give it a try. After disassembling the screen, I noticed that the ICs on the left side were directly attached to the glass. The logic board was connected using only two film ICs. On the right side, there were labels like CKV1, CKV2, CKVB1, CKVB2 (the original post mentioned six lines, but I only saw four). These four wires were connected to both sides of the screen. I carefully cut the wires leading to the glass without the ICs. After reassembling and testing, the image looked normal—no more up and down shaking. Occasionally, I still saw a green horizontal line, but it didn’t affect the viewing experience. I suspect the screen might have been defective even before the repair. I want to thank the user "li761996837" for sharing their knowledge. Being part of this maintenance community has helped me learn a lot. Without people like you, it would take much longer to gain such experience. Thanks to everyone! Your contributions make this forum exciting and full of valuable insights. Keep sharing! ! !
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