I have a red light LOS on ONT and cannot connect to the internet

[SGLans]

I have RED LOS light on ONT and cannot connect to the internet. Your App tells me that there are no issues

[Daniel0210 · Accepted solution]

@SGLans 
You aren’t communicating with Sky by posting on here. This is a customer ➡️ customer discussion forum where we try to help other Sky customers.

Use this link to check to see if there are any broadband issues or outages nearby (even if you’ve already tried it ~ it doesn’t necessarily disclose a problem immediately and it takes a little while to update so perhaps retry later).
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 okay 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 contact Sky to report it. The easiest way is to dial 150 free from your Sky Talk landline if it’s still working.

This link provides information about the coloured lights on the various hubs
https://www.sky.com/help/articles/hub-lights-explained-start

Working from home?: Sky broadband being discussed here is a domestic service and whilst it's fine for those customers working from home to use it, they won’t receive additional or quicker support.

[Waveman]

RED LOS light is Loss of Signal. It indicates that the ONT is not connected to the fibre network, 

Check the green plug is correctly connected to the ONT, if it is and the cable is undamaged then yopu will need to contact SKY as a damaged fibre, disconnection in the network or a faulty ONT. All of which can only be resolved by Openreach by contacting Sky.

https://www.sky.com/help/articles/contacting-sky