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PixelationWhoas2
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Wednesday, August 20th, 2025

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Modem causing tv pixelation

When ever there is any activity on my xb8 modem the tv completely pixelates and sound cuts out. With the modem unplugged the tv works perfect. A quick web search shows this is a very common problem. The tech's replaced the coax from the pole to the tv. Ive replaced the cable box twice and the modem 3 times .

I replaced the tv as well. Nothing fixed the trouble. I can't find anywhere on the hundreds of similar complaints where comcast has provided a good fix this trouble.

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23 hours ago

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XfinityMatthew

Official Employee

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914 Messages

1 month ago

Hello @PixelationWhoas2 We appreciate you replacing the equipment and cables already. We would like to do some troubleshooting for you to see if we can figure out the cause. Are the modem and TV box sharing a splitter on the same outlet or separate outlets?

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PixelationWhoas2

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@XfinityMatthew​ 

This trouble was finally fixed by switching to a wireless cable box . The tech's could not solve the problem of modem communication putting interference on the cable signal to the tv.

PixelationWhoas2

3 days ago

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XfinityEmilyB

Official Employee

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2.4K Messages

 

PixelationWhoas2 Thank you for taking time out of your busy day to update your post with the solution! I'm so glad the technician was able to upgrade your cable box and you can enjoy your TV service :). Our forum page is an excellent resource to find answers to all your Xfinity questions and you can always manage your account, troubleshoot, and get help through the Xfinity app. Thank you for your continued loyalty and I hope you have a great rest of your day! 

 

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23 hours ago

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