We switched over from DirecTV to Xfinity a few days ago and have internet and TV set up. I have no issues with the internet connection and TV if only the main TV DVR box is set up. However, if the second small TV box is connected I get dropped frames and pixelation on both TVs. Just disconnecting the second box from the coax solves the issue. It doesn't matter which room the boxes are connected to. The external cable is split 1 to 4, (gateway, DVR, small box, and capped). Tried resets and system restores. Is this an issue with not enough signal entering the house or a bad small box? The buried cable in the yard is over 20 years old. They won't send a technician to check the buried cable since one TV is working because of COVID and high demand.
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