Noisy Home Internet Router

I have cable internet connected at home, I’m using the Optus hybrid fibre/coax network (HFC), recently I had some performance issues, the old modem had started to go a bit flakey and Optus came and swapped my faulty modem/router. Thats when the noise on HF started, s9 hash constatntly, mostly on 7MHz, but all over…