TV pixelation issue

Hi @user_pex6lo, 

Thank you for making a new post, so we can provide more help. I see that after you received and activated the XB8, you've had picture issues on your end. I understand; however, it gets better if the XB8 is shut down, which is interesting. Can you confirm if both your cable box and XB8 share the same outlet?  If so, can you check the splitter for any visible issues?

The splitter is a small rectangular box that splits the main outlet into two, enabling devices to share it. Do you see anything like this on your end? 

I have the pixelated problem on all channels but streaming is fine. When I shut down the WIFI, the tv channels are perfect like normal. As soon as the WIFI is turned back on, the channels all pixelate again. I don’t have a smart tv. It’s an LG from 2009. This just started yesterday after a month of spotty outages in our neighborhood. I do have a technician coming out June 9th.

Similar story here. Xfinity did an upgrade in our area and that’s when the pixelation issues started. Replaced the modem and no difference. No issues with streaming or when I unplug the modem. This seems to be a common problem with the newer modem that Xfinity is not addressing 

Tried everything. Restarting, unplugging, even did a chat with Xfinity several times and they did restart. It happens on all channels and on taped shows. Live action, especially sports have the most pixelated images. It’s terrible and the only thing that makes it stop is to unplug my modem or watch via streaming.

Here in Katy, TX.
I am having the same issues with my live tv, there are pixelation happening and sometimes the live broadcasting just freezes.
And before you technicians say change wires and check for loose wiring, I have just bought from Best Buy Rocketfish coaxial cables, splitter, HDMI 4K Cable and they are all nicely tighten.
The internet speed is ok, but not as good as I was promised. I am currently at the 2.1 Gigabytes speed, which I do not see it.
The Cable box has been replaced and so as the modem/router "XB7". I have gone thru the app to refresh the signal with no success. The XB7 has been restarted several times with also very little success.
And when on the phone with Xfinity support all they recommend is a house visit by a technician at the cost of $100 with no promise of it been resolve, but the service fee will be charge.
The Xfinity app says no outage, but when trying to refresh the cable box i get a message that their is an outage and its been worked on, so is there an outage or not.
Then I call again to Xfinity support and another representee tells me that there working in my area and to be patient.
This issue has been going on for about 3 weeks now. It first started with a pixeled here and there, now 3 weeks the pixelation is constant.
Now the streaming from Apple, Disney+, Netflix & other services those I have no problems the picture is clear.
The problem is with the Xfinity signal.
Well Xfinity will I get credit in my billing since I cannot see my live TV.
Xfinity when will this issue be resolved?

I had the same issues with pixelation every 30-45 seconds on every channel of live TV only (streaming was fine). This happened as soon as Comcast made me upgrade to the XB8 Modem (white, rectangular, stands upright). I FOUND THE SOLUTION. After coming across another customer's post on another Xfinity forum, I replaced the 2-way coaxial cable splitter with a Cable Amplifier (Amazon, Reliable Cable 5- Port Cable TV Modem Splitter Signal Booster/Amplifier with Active Return, $28.84). I would hope that when Xfinity tells people that they need to upgrade their modem that they also let people know of the signal issues between the new modem and existing cables. I hope this helps someone out there because I know how frustrating it was!