topic Re: Power light flashing in Broadband

Power light flashing

Sallyr1 — Mon, 22 Jun 2026 17:01:37 GMT

We’ve just had a severe thunderstorm, all other electrics are working and I've changed the modem to a different socket but light still flashing

Re: Power light flashing

caesarome — Mon, 22 Jun 2026 18:25:04 GMT

@Sallyr1

This explains the lights on the hubs:
https://www.sky.com/help/articles/hub-lights-explained-start

Re: Power light flashing

Deb3000 — Mon, 22 Jun 2026 18:27:46 GMT

You don't make it clear if by "modem" you mean the ONT, (the fibre box on the wall), or the router. You also don't indicate what colour it is.. Anyway...

If it is the router power light, flashing green suggests it's trying to do a firmware update. Flashing amber means it is in recovery mode and needs a factory reset with the little button on the back.

For an Openreach ONT, flashing green is normal start up, (not if it's stuck, obviously), or a firmware update.

For a Cityfibre ONT flashing amber is a firmware update again.