No broadband - Router shows White light. G.fast Modem DSL light flashes (should be steady)

[Simon-on-Tiscali]

I've got a similar problem to many others here. It started at the end of November. At first it was momentary disconnections. Today, I hardly get broadband at all. It's up for 5 minutes, then off for an hour or more.

Reporting it via the chat service hasn't helped. They keep marking the issue as 'resolved' when it isn't. Do I need a new router?

[Simon-on-Tiscali]

Many thanks Keith. I do have a Sagemcom router, and I've done that change. It's now been up for 15 minutes, which is the longest so far today.  I'll report back in an hour and assume it's a permanent fix if it's still up.

*** 40 mins later ***

No, it didn't quite make it to an hour, and dropped out after about 45 minutes (same symptoms). It came back again after about 5 minutes, so it seems to be a lot better than before that change to using Google DNS. But not a permanent fix.

Thanks very much for the suggestion though, Simon.

[KeithFrench]

Do you have a Sagemcom router? If so, try changing the DNS server from TalkTalk (79.79.79.79) to Google DNS (8.8.8.8). Log into the router & go to:-

Dashboard > See internet settings > Manage advanced settings > Internet connectivity > DNS IPv4

Then change the DNS dropdown box to Manually Specify DNS. Then set DNS 1 & DNS 2 as 8.8.8.8 and 8.8.4.4.