I have a LG 32LH30 TV. When I power on the TV I get a picture in the top half of the screen and vertical lines in the bottom half. Also I get a thin white dashed line across the middle of the screen. After about 10 minutes I get full screen picture. However the top third of the screen is lighter than the bottom two thirds. I still have the thin white line across the middle of the screen. I am using HDMI cables from my cable box. I also tried Audio/Video and Component cables. I took the back cover off the TV and the capacitors and everything looks good.
SOURCE: Top third is good picture, bottom 2/3 is pattern..
Try replacing the HDMI cable for a good quality cable and do not use any force when inserting it.
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