In the small village of Aberhosan in Powys, Wales, residents faced a peculiar problem for 18 months: every morning at 7 a.m., their high-speed internet would suddenly go offline. The cause was not a damaged cable or a storm, but something far more unexpected—an old second-hand television that a local resident turned on at the same time each day. This television emitted a type of electrical interference known as SHINE, or "single high-level impulse noise," which disrupted the village’s internet network.
The outages were unusual because they occurred at the exact same time every day, which initially confused engineers. They suspected a fault in the network and replaced cables, but the problem returned the next morning at 7 a.m. Eventually, engineers from Openreach, the company responsible for maintaining the UK’s internet infrastructure, used a spectrum analyzer to detect the interference. At 7 a.m., the interference repeated itself, leading them to a house where a resident had been turning on the old television daily.
The owner of the television expressed embarrassment and agreed to stop using the device. Since then, the internet outages have not returned. The case was reported by the BBC on September 22, 2020, and became an example of how the cause of a technical issue can sometimes be overlooked, even when it is very close to the source.
While the exact date of the discovery is unknown, the case highlights how everyday household items, especially older or second-hand devices, can cause unexpected disruptions. Similar incidents have been reported, such as microwave ovens interfering with radio telescopes. The story serves as a reminder that regular disconnections at specific times may be caused by devices being turned on at those times, and that a systematic approach to identifying the source can be highly effective.
Welsh Village's 18-Month Internet Outages Caused by Second-Hand Television
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