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Very Poor Picture Quality on LG OLED TV Using Xfinity's 4k UHD Box

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Very Poor Picture Quality on LG OLED TV Using Xfinity's 4k UHD Box

Purchased an 65" LG OLED 4K UHD HDR TV. Due to extremely poor picture quality with our X1 box, Xfinity sent me a 4K UHD box (XG1v4-A). Unfortunately, the picture quality was worse on the 4K box than it was before on the X1 box. The HD channels look terrible - SD at best. We are able to stream Prime Video channels at 4k resolution and they look amazing. Clearly there is an issue with the cable. Tried replacing HDMI cable - no improvement. We even had a tech come out, replace a splitter and then proceed to tell us that there was nothing else he could do. The picture quality was no better. Grainy/pixelated/blurry HD channels. So incredibly disappointing...

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Re: Very Poor Picture Quality on LG OLED TV Using Xfinity's 4k UHD Box


@MarbleIsland wrote:

Purchased an 65" LG OLED 4K UHD HDR TV. Due to extremely poor picture quality with our X1 box, Xfinity sent me a 4K UHD box (XG1v4-A). Unfortunately, the picture quality was worse on the 4K box than it was before on the X1 box. The HD channels look terrible - SD at best. We are able to stream Prime Video channels at 4k resolution and they look amazing. Clearly there is an issue with the cable. Tried replacing HDMI cable - no improvement. We even had a tech come out, replace a splitter and then proceed to tell us that there was nothing else he could do. The picture quality was no better. Grainy/pixelated/blurry HD channels. So incredibly disappointing...


each new device attached by HDMI will need to have the TV settings (some examples: brightness, backlight, contrast, sharpness...) adjusted for the best picture.  A 4k TV basically is 4 1K 1080p screens 2 tall by 2 wide. the 720p or 1080p output must be magnified/zoomed by 4 times to fill the screen. generallly the TV does a better job at scaling, however you can try both the cable box at 4k output put the TV in 1080p mode and let the TV upscale (enlarge/zoom) the image. be sure all 'motion' related settings are off for the cable  set top box.



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Re: Very Poor Picture Quality on LG OLED TV Using Xfinity's 4k UHD Box

our suggestions helped some. Thank you.