This tv was given to me a few months ago because a couple of problems showed up and they didn't want to fix it, so I took it apart to see if I could find the problems.
The 1st problem was the right side of the screen was darker than the left and was solved (at least for now) by repairing the tab bond on the right side. It still shows up for a minute or 2 when you first turn it on but clears up and is good until you turn it off again for a while and then the same until it warms. I can live with that.
The 2nd problem was after the tv was on for about 15 minutes the picture would freeze and gradually go dark. You could turn it off and right back on and it would be ok for another 7 or 8 minutes then it would do it again. I figured something was getting hot so I put a fan behind it and that stopped it from going freezing and going dark for now.
The 3rd problem. I hadn't had time to mess with it anymore but the new problem popped up about a week ago with Horizontal lines that cover the whole screen and Ghosting kinda like an old analog tv with an antenna hooked to it. They showed up at the exact same time as well. I'll post some pics.
The things I have tried are removing and reseating all connectors or cables on everything with no change. I disconnected each ribbon one at a time from the tcon to panel and each half of the screen still had the horizontal lines with the second ribbon still connected. I noticed a small burn mark on a chip on the tcon board. The board has this chip labeled U105 if that helps any. I removed the tcon board and the back side was also was showing signs of a heat problem under the area where the burnt chip is.
I know that Horizontal lines probably mean a panel failure but is there any chance the tcon could cause this? I figure it was probably the reason for my 2nd problem at least.
Thank you for any help you can give.
The 1st problem was the right side of the screen was darker than the left and was solved (at least for now) by repairing the tab bond on the right side. It still shows up for a minute or 2 when you first turn it on but clears up and is good until you turn it off again for a while and then the same until it warms. I can live with that.
The 2nd problem was after the tv was on for about 15 minutes the picture would freeze and gradually go dark. You could turn it off and right back on and it would be ok for another 7 or 8 minutes then it would do it again. I figured something was getting hot so I put a fan behind it and that stopped it from going freezing and going dark for now.
The 3rd problem. I hadn't had time to mess with it anymore but the new problem popped up about a week ago with Horizontal lines that cover the whole screen and Ghosting kinda like an old analog tv with an antenna hooked to it. They showed up at the exact same time as well. I'll post some pics.
The things I have tried are removing and reseating all connectors or cables on everything with no change. I disconnected each ribbon one at a time from the tcon to panel and each half of the screen still had the horizontal lines with the second ribbon still connected. I noticed a small burn mark on a chip on the tcon board. The board has this chip labeled U105 if that helps any. I removed the tcon board and the back side was also was showing signs of a heat problem under the area where the burnt chip is.
I know that Horizontal lines probably mean a panel failure but is there any chance the tcon could cause this? I figure it was probably the reason for my 2nd problem at least.
Thank you for any help you can give.
Attached Files
Comment