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At that time of night it could be essential overnight maintenance taking place which is carried out then to minimise disruption as most customers are asleep.
If It's not back up and running by 0700 try this link to check to see if there are any broadband problems or outages nearby.
https://www.sky.com/servicechecker
This should determine if there's an identified fault, perhaps affecting multiple households.
If there aren't any then try running the line test here
https://www.sky.com/help/articles/broadband-diagnostic-start
You can also run the test via the MySky app on a mobile data connection.
Once completed, if it reports back that all is good click on 'broadband' to run an updated test. If you get amber or red you need to follow the on-screen instructions.
If you’re still having problems you may need to call Sky to report it. Dial 150 free from your Sky Talk landline (if it’s still working).
This link providers information about the coloured lights on the various hubs
https://www.sky.com/help/articles/hub-lights-explained-start
Its worth adding that for customers working from home remember that Sky Broadband is a domestic service so you won’t receive any extra or quicker support.
▪️I AM NOT A SKY EMPLOYEE (undercover or otherwise)▪️
Sky customer since 2001
with: Sky Q | Sky Superfast Broadband | Sky Talk | Sky Mobile
NOTE: I only provide help on the forums and NOT via PM
