lost broadband connection

[#1]

Broadband light just flashes, have checked filters etc; all ok, according to plusnet everything ok with phone line. This started last week , had been fine up till then.
Any ideas, engineer can come and check butwould cost £60 if fault is our end, when trying to connect just get local only.

[#2]

Hi there,
Sorry to hear about the issue with your connection. In all honesty it could be one of quite a number of things causing this so we'd need to continue with a fault investigation.
I've just had a look at ticket 55930074 and it looks like we're awaiting to hear back from you with regards to some fault checks.

[#3]

Thanks for quick reply, have done all checks and still the same  just broadband light flashing, Cannot connect even with ethernet cable.