This is why EM interference can be an issue....

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    Em Interference
AI Thread Summary
Electromagnetic interference (EMI) can significantly disrupt broadband signals, as demonstrated by a case in Wales where an old CRT television caused daily internet outages. Engineers used a spectrum analyzer to identify the source of interference, which was traced to the television being turned on each morning. The discussion highlights the complexities of tracking down such signals, with participants sharing experiences from "fox hunts" to locate interference. Questions arose regarding the specific mechanisms of older TVs that generate more interference compared to modern devices. Overall, the conversation underscores the challenges of identifying and resolving EMI issues in residential areas.
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JT Smith said:
We have kind of the reverse problem. Since we don't watch very much TV we've shunned the expensive cable company and stuck with over-the-air TV for years. The number of channels is limited but it's worked okay... until the last few years. The number of channels we can get, even with excessive adjustment and moving of the indoor antenna, which we have replaced twice, has been steadily decreasing.
I'm still using OTA TV, but the channels have been rising fast due to digital TV. They are moving to UHF, so maybe you need a new antenna (outside on the roof or a pole).
 

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