Hi, New to the forum here, was hoping to get a bit of insight to an issue with a TV I was given. I received it in this condition, so I don't really know the backstory in detail.
It is a Sharp Aquos LCD85U. It powers up fine, but one third of the screen is "blank". Not dim, just missing like somebody drew a straight edge across the screen and magically turned that zone off. It also has, about a half inch apart, from top to bottom, faint ghost lines going across it, sort of like a spiral pad notebook, which is hard to see in the pictures below.
I believe it is a cable or a circuit board to blame, because the backlights are visible through the case openings from the back across the whole TV, and a light touch from your finger on the LCD screen itself(I'm sure this is a big no-no for the gurus here) will make the screen go "colorful" for a lack of a better word, across the entire panel, regardless of area, and consistently. There are no visible cracks or shatters in the panel either.
So far, here is what I've done to attempt to resolve the issue.
- Verified that it happens on all inputs.
- Verified that the system menu has the same problem (indicating problem with the set itself)
- Reseated all cables and connectors that I could find.
- Looked for leaking capacitors. (found none)
- Looked/sniffed for burnt components. (found none)
- Replaced the T-Conn board with one I bought from an online retailer, which came in a sealed static bag, with a "inspection and properly working" tag. It was the exact board, down to the revision number.
I was really hoping the T-Conn board would fix it, but it did not.
From here, I'm not positive which way to go, as tv repair isn't my strong point. The two wide ribbon cables, exiting the T-Conn board, are what I'm thinking. At a glance they look the same, but they do have different part numbers. My thought process is if they are physically the same, and they were the problem, it would move the problem to the other side of the screen, indicating I need to replace them...
Any advice would be greatly appreciated.
Thanks!
It is a Sharp Aquos LCD85U. It powers up fine, but one third of the screen is "blank". Not dim, just missing like somebody drew a straight edge across the screen and magically turned that zone off. It also has, about a half inch apart, from top to bottom, faint ghost lines going across it, sort of like a spiral pad notebook, which is hard to see in the pictures below.
I believe it is a cable or a circuit board to blame, because the backlights are visible through the case openings from the back across the whole TV, and a light touch from your finger on the LCD screen itself(I'm sure this is a big no-no for the gurus here) will make the screen go "colorful" for a lack of a better word, across the entire panel, regardless of area, and consistently. There are no visible cracks or shatters in the panel either.
So far, here is what I've done to attempt to resolve the issue.
- Verified that it happens on all inputs.
- Verified that the system menu has the same problem (indicating problem with the set itself)
- Reseated all cables and connectors that I could find.
- Looked for leaking capacitors. (found none)
- Looked/sniffed for burnt components. (found none)
- Replaced the T-Conn board with one I bought from an online retailer, which came in a sealed static bag, with a "inspection and properly working" tag. It was the exact board, down to the revision number.
I was really hoping the T-Conn board would fix it, but it did not.
From here, I'm not positive which way to go, as tv repair isn't my strong point. The two wide ribbon cables, exiting the T-Conn board, are what I'm thinking. At a glance they look the same, but they do have different part numbers. My thought process is if they are physically the same, and they were the problem, it would move the problem to the other side of the screen, indicating I need to replace them...
Any advice would be greatly appreciated.
Thanks!
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