https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355602#M589143 <P>“I work for OR”.&nbsp; Shouldn’t you know what a flashing PON light means then?</P><P>&nbsp;</P><P>It means it is not authenticating with the OR network.&nbsp; It could be a number of things but most likely a serial number mismatch with the headend.</P> Wed, 26 Aug 2026 16:12:19 GMT Deb3000 2026-08-26T16:12:19Z https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355523#M589120 <P>ONT has Flashing PON.&nbsp;<BR />( i work for OR)&nbsp;</P> Wed, 26 Aug 2026 15:01:06 GMT https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355523#M589120 BennOwens 2026-08-26T15:01:06Z https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355574#M589132 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4766904">@BennOwens</a>&nbsp;</P> <P>Try running this line test to see if it finds any faults:<BR /><A href="https://www.sky.com/help/articles/broadband-diagnostic-start" target="_blank">https://www.sky.com/help/articles/broadband-diagnostic-start</A></P> <P><BR />You can also run the test via the MySky app on a mobile data connection.</P> <P><BR />After this has finished and if it reports back all is good click on broadband to run an updated test. If you get amber or red please follow the on screen instructions.</P> Wed, 26 Aug 2026 15:44:05 GMT https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355574#M589132 caesarome 2026-08-26T15:44:05Z https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355602#M589143 <P>“I work for OR”.&nbsp; Shouldn’t you know what a flashing PON light means then?</P><P>&nbsp;</P><P>It means it is not authenticating with the OR network.&nbsp; It could be a number of things but most likely a serial number mismatch with the headend.</P> Wed, 26 Aug 2026 16:12:19 GMT https://helpforum.sky.com/t5/Broadband/Flash-pon/m-p/5355602#M589143 Deb3000 2026-08-26T16:12:19Z