Visitor
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6 Messages
Poor picture quality
I just got an Xfinity wireless cable box with my brand new LG 4K TV and when I watch Comcast/Xfinity, the picture quality is so much worse than watching shows/sports on other apps. I have played with the resolution through Comcast and that doesn’t seem to work. Looks like a lot of people have had this issue. Anyone able to solve it? Would a new HDMI cord make a difference?
Rustyben
Expert
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24.6K Messages
2 years ago
more information needed. on the new 4k tv use the voice remote and 'about'. reply with the line after STB version number. as an example mine says ax014an.
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Rustyben
Expert
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24.6K Messages
2 years ago
the set top box is set to give your TV the best resolution. Can you describe the problem you are seeing as you watch for example a network game show or news show?
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user_7d4c3f
Visitor
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1 Message
2 years ago
We just installed an Xfinity wireless cable box, also with a brand new LG 4K TV and noticed the same thing. The picture quality on the LG, including using apps, is lovely--and can be changed to many different levels of saturation, etc. When you use the wireless box there doesn't seem to be any way to adjust the quality of the picture. It's VERY bring, everything VERY saturated, lots of contrast. It's not terrible, it's watchable, but it's nothing like as good a picture as we get when we don't use the wireless cable box but just watch the tv's streaming apps. Is there any way to adjust the picture??? Or do you just get what you get? Would it be a better picture (and more adjustable) if it were a cable connection instead of a wireless one? We get a lovely picture on the tv that is attached to cable but I haven't looked to see if it's adjustable.
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user_623a0a
Visitor
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2 Messages
2 years ago
Set you for 4k tv’s HDMI setting to deep color and problem solved. Typically it’s off for the Xfinity box because almost all their broadcasts are in HD.
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MNtundraRET
Gold Problem Solver
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5.9K Messages
2 years ago
The problem at least for cable. is that Comcast delivers only a 720p signal for HD channel. Only 420p for SD channels.
They somehow convert 1080i channels to 720p. You will get a better picture watching 1080i channels over the air.
Your television may have some automated systems that when turned off may improve the picture.
As my grandmother liked to say: "You can't make silk from a sow's ear.".
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MNtundraRET
Gold Problem Solver
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5.9K Messages
2 years ago
Did you go out and purchase a high-speed 4K HDMI cable.? I would not trust Comcast cables since they are not labelled that way. You cannot use the older HDMI cables on a 4K television.
My 2016 Samsung 4K 3D television gets an acceptable cable picture on a RNG cable-box with my current adjustments on the tv. I don't know if that would be the case using a X1 cable-box. I use DSL for Internet and can't use X1 cable-boxes.
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