Watching tv tonight and the brightness started changing. It goes from normal to dim. I have UVerse and it is like when I hit the guide button and the screen dims. It is not the uverse box. I unhooked it and the screen kept changing. Dont know if it is related but I also have a vertical strip of lines on the right side of the screen maybe 2' wide. This as been going on for a few months.
SOURCE: 40 inch lcd blue line vertical
The display screen is made of a matrix of elements connected to cables
along the side and top. On your unit, some of these many, tiny
connections are making contact intermittantly thus losing the elements
in that area. These contacts are held in place with just pressure and
if that is disturbed, you lose that line of elements. Try squeezing the
cabinet of the TV on the outside at the top in the area of the loss and
see if that makes a difference. May have to go inside and see if the
contact assembly is disturbed or warped or something.
Hope ya fix it!
SOURCE: Vertical lines in LCD tv screen
Need to check the two things.
1st -- need to exchange T-con Board.
2nd -- need to exchange the cables between T-con & LCD panel or
between T-con & Main(LVDS cable)
SOURCE: Programing Remote
1343 or 1005 are the codes - press the TV mode button and the OK button together - the release at the same time - the top row of mode buttons needs to blink twice - then enter the code - the TV button should blink 2 times - try the power and volume buttons - if it worked then be sure to press the ATT mode button again after so you can change the channels
SOURCE: sylvania ld320ssx remote code for att uverse
Try 1864. It worked for a Media-Com remote, when none of the other codes worked.
SOURCE: When I trun on TV (Samsung LN-T4661F 46 In), it
Samsung made a bad TV, the new part is $1200 I have the same issue. it is a blurred picture from left to right after about 10 min it goes away. (18 month old tv) it is only going to get worse.
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