We recently had some building work done and they unplugged the main Deco router, TP Link box and NBN to do the work. I now can't get it started up again. I've tried resetting the main unit and have made sure I've plugged things in and turned them on in the right order (I think) but I get flashing blue light, old wifi network names and default network names are visible on my phone but no internet connection on any of them... then main light goes solid red.

I have boosters around the house which I haven't tried unplugging yet - could that me the issue?

Any tips for replugging in and powering up a previously very good system? In Australia with an NBN box and a TP link which hardwired to various ethernet ports around the house plus using WiFi for mobile devices.