RBR750 Mesh network

I have an RBR750 mesh network with 2 satellites. They have worked well for over a year. The router is in my basement, one satellite is one flight up on the main level and the 2nd satellite is 2 stories up on the top level of the house. All of a sudden the satellites are no longer communicating with the router. They are flashing white and pink and sometimes blue. I have brought both of them into the same room with the router and reset them and attempted to sync them. In the same room all lights go out but when I put them in the other rooms - no success!

I would appreciate any advice to help get them back on line. I have no issues with the router.

Thanks.