This is the second time it has happened with this router, I did ask for a new router but you would not replace this one. it is working at present. But it may start again later or some days or weeks. It starts with us thinking the internet is down, as the tv won't play netflix/ iplayer. Then I realise my phone is not connected and then after testing the phone line I check the router, but some times the light goes orange or it stays white but there is no wifi because the password has gone to the factory one. So I then change it to our set one and then we start again.
