D7000 - no internet

I have had fibre broadband via a d7000 netgear router since the start of last year. Suddenly last night the internet light turned orange and no access to the internet. Broadband light is fine. I plugged in the talk talk router and the internet is back. Plugged the netgear router in and the internet stops working. Were there any changes made in the last 24-48 hours that may have affected this?