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Top half of screen darkened
My HD75 - UN75F7100 top half of my screen has begun to darken.. I have uploaded/updated software and did a complete reset... but still the upper half of the screen has this darkened area completely across the top and approximately 1/3 to 1/2 of the screen... serial number is Z7MS3CADA01667D
ANSWERS:
Be sure to scroll down this string. If you have Xfinity boxes through Comcast, there's a good chance all you have to do is push the reset button on your cable box. After running through all the reset options for the TV and its various display settings, I read Ray Negron's post. He suggeste a VERY simple fix that worked great for me. Just hold the reset button on your Xfinity box until the blue power light goes off. Wait 20 seconds and repower the device by pressing the reset button again. Shadow across top of set disappears.
I unplugged everything.... cable box, HDMI cable, TV & even my modem/router.... waited 10 minutes then powered back on & haven't had the trouble since.
Tony Sinclair that looks more like a bad LED backlight strip. For that you will have to disassemble your TV and the LCD panel. Not a fun thing to do but possible. Of curse you do want to check all the wiring specifically the wiring on the power board. Post some images of your boards and the data label on your LCD panel. Post those with your question. Here is the guide for that Adding images to an existing question It will let us see what you see.
Unplug everything associated with your tv. Wait a minute, then reconnect things. Problem solved with my Samsung 4K.
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