@Fran63 assuming you have a black Sky hub the last light is the digital phone service. Where thst is off but the hub has a green internet light power down the hub for at least 30 minutes and reconnect which should clear the fault. If it doesn't call Sky.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
