We have a solid green "mode" light on our Huawai B315 modem and no internet connection. It is showing 3 bars. I believe the "mode" light should be blue. I have tried to reset and restart but no change - still green. We can connect devises to it but they can't connect to the internet. Was working fine yesterday. There is no ethenet cables plugged into the modem. We are on rural broadband and connect via an arial which is plugged into the back. Any suggestions?