The mystery of why an entire village lost its broadband every morning at 7am was solved when engineers discovered an old television was to blame.
Engineers walked around the village with a monitor called a spectrum analyser to try to find any “electrical noise” to help pinpoint the problem. “Our device picked up a large burst of electrical interference in the village. It turned out that at 7am every morning the occupant would switch on their old TV which would, in turn, knock out broadband for the entire village.”
The TV was found to be emitting a single high-level impulse noise (SHINE), which causes electrical interference in other devices.
https://www.bbc.com/news/amp/uk-wales-54239180
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