I have a 50UH5500 lg tv with no picture. Previously I thought it was due to the backlights. But that was resolved ( https://www.badcaps.net/forum/showthread.php?t=85170 )
Now I have this tv with fully functioning backlights and when I turn it on I get some start up sound as well. I figured the logic board is working. I see the optical port lit up and as well I'm getting voltage to the t-con board. I also now hear a buzzing that sounds like its coming from the T-con board.
I moved down to the t-con board and verified that there was signal going in.
Next I disconnected the left ribbon cable going to the screen and applied power. No buzzing and I get picture on the right half of the screen. (right and left looking at the back of the tv).
Then I reconnected the left ribbon cable and disconnected the right ribbon cable. Turned the tv on again and I get garbage on the left half of the screen and nothing on the right half. (again no buzzing)
*Edit* the side that does not have a connection is white
Reconnect the right ribbon (both panel ribbons connected again). I turned on the tv and get no picture again and the buzzing is back.
At first I thought this was a display problem and a bad t-con board as both seem sides seem to be producing something. But why it not display anything when both sides of the panel are connected. Is there a short in the screen some how?
Anyone have any insight?
Now I have this tv with fully functioning backlights and when I turn it on I get some start up sound as well. I figured the logic board is working. I see the optical port lit up and as well I'm getting voltage to the t-con board. I also now hear a buzzing that sounds like its coming from the T-con board.
I moved down to the t-con board and verified that there was signal going in.
Next I disconnected the left ribbon cable going to the screen and applied power. No buzzing and I get picture on the right half of the screen. (right and left looking at the back of the tv).
Then I reconnected the left ribbon cable and disconnected the right ribbon cable. Turned the tv on again and I get garbage on the left half of the screen and nothing on the right half. (again no buzzing)
*Edit* the side that does not have a connection is white
Reconnect the right ribbon (both panel ribbons connected again). I turned on the tv and get no picture again and the buzzing is back.
At first I thought this was a display problem and a bad t-con board as both seem sides seem to be producing something. But why it not display anything when both sides of the panel are connected. Is there a short in the screen some how?
Anyone have any insight?
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