@Nawaba1 the ONT (not really a modem but does a similar job) is showing it isnt receiving an optical signal. Asuuming the green fibre pigtail cable is not lose you need to call Sky as it requires Openreach or City Fibre to check what is wrong and fix it
LOS = Loss Of Signal.
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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
