Internet doesn't work and I see all 4 port lights flashing. What's wrong?
Have you had any lightning?
Turn it off for 2 minutes.
If that doesn’t fix it there should be a pin reset button, hold that in until it reboots.
If it’s still not working ring your provider as it will likely need changing.
Installed and replaced hundreds of them 4+2 ONT’s over the years.
Came across that fault quite often, in fact it was so common we had a nickname for it. Disco Lights of Death or something like that.
Basically yeah, it’s Ducking Ducked Ducked and will need to be replaced.
Good luck reporting a fault through BT.