@ComcastTeds First of all, thank you SO much for all your help thus far and for your detailed explanation. It's given me hope for the first time in years that this can actually be solved. I really appreciate it.
You mentioned that you " have asked a colleague to review your account and reach out to you" and just today I received a call from someone wishing to discuss the issue further. I'm going to call them back right away and will report on my results. Hopefully they'll be able to help resolve the issue, and either way I'll report back on what happens.
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I am writing this in the hopes that somehow, someway this problem can be addressed and actually solved properly, because thus far it has not been solved despite numerous attempts over literally years. Essentially ALL TV's in my house pixelate badly off-and-on throughout the day. Sometimes the picture will simply freeze altogether; or I'll get a black screen and/or a message saying something along the lines of "this channel will be available shortly". I often consider the picture to be so bad that it is literally unwatchable (repeatedly going out for 30 seconds or so before returning).
The problem is intermittent, to the point where it might be fine for an hour or two and then suddenly the picture will degrade into a horrid mess of pixelation. It is usually at its worst sometime between 9AM and 6PM (although it has occurred at other times as well), visible 5+ days a week, and generally affects the high definition channels more-so than the low definition channels. Many (if not most) channels are affected.
This has been happening over at least the past 5 years during which I have had at least 5 or 6 service calls; each time they've left with the picture working ok and promising me that everything was "fixed," however each time the problems returns shortly. Usually when they come the problem conveniently isn't even present, and dealing with their tech support is so painful that I rarely have the time & energy to do so. No turning the box off and waiting 30 seconds doesn't fix it... Twice they have replaced every single connector/splitter in the entire house to no avail. They've also replaced HDMI cables, boxes, etc. Nothing that they've done has ever helped.
My neighbors (the ones who haven't already switched to another service) have complained about poor service as well; virtually the same issue as mine. I am posting here to hopefully get more help than I've gotten over the last 5 years from Comcast.
TLDR: Pixelation problems occurring for over 5 years, virtually everything in house has been replaced by comcast, and at least 5 service calls haven't fixed or helped the problem
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