topic Re: LOS red light in Broadband https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182553#M544701 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4580555">@Nawaba1</a>&nbsp;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&nbsp;</P> <P>&nbsp;</P> <P>LOS = Loss Of Signal.</P> Mon, 05 Jan 2026 15:46:58 GMT Chrisee 2026-01-05T15:46:58Z LOS red light https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182545#M544695 <P>Everything was working fine all of a sudden the internet went down.</P><P>&nbsp;</P><P>I have the fiber cable going into the openreach modem that connects to the Sky router via Ethernet cable.</P><P>&nbsp;</P><P>The LOS red light is on the openreach modem.</P> Mon, 05 Jan 2026 15:39:40 GMT https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182545#M544695 Nawaba1 2026-01-05T15:39:40Z Re: LOS red light https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182553#M544701 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4580555">@Nawaba1</a>&nbsp;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&nbsp;</P> <P>&nbsp;</P> <P>LOS = Loss Of Signal.</P> Mon, 05 Jan 2026 15:46:58 GMT https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182553#M544701 Chrisee 2026-01-05T15:46:58Z Re: LOS red light https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182558#M544703 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4580555">@Nawaba1</a>&nbsp;And the sky info link if that is needed for you!</P><P>&nbsp;</P><P><A href="https://helpforum.sky.com/t5/Broadband-Talk/Can-t-connect-to-broadband-and-have-a-red-light-on-your-ONT/ba-p/5151861" target="_blank">Can't connect to broadband and have a red light on your ONT</A></P> Mon, 05 Jan 2026 15:50:25 GMT https://helpforum.sky.com/t5/Broadband/LOS-red-light/m-p/5182558#M544703 JimM1 2026-01-05T15:50:25Z