If you're on Halo then you're entitled to a 4g Hub to get you by until they fix the problem.
I had that same fault a month or two back and the cause was external to our property, have you checked the Service Status Page to see if there's a fault in your area. See https://my.bt.com/consumerFaultTracking/public/faults/tracking.do?pageId=31
When I had this fault it was just a solid orange light, no blue. Maybe it's different with me being on FTTP?
@Anonymous wrote:
When I had this fault it was just a solid orange light, no blue. Maybe it's different with me being on FTTP?
Probably so, as you had a modem, which might be the case here. Could even be an old white Openreach modem plugged into the phone line?
I assume you do not have a direct fibre into your property?
Do you have any other Openreach equipment, like another box with lights on?
What is actually plugged into your phone line?