Setting up third TELUS Booster

I just bought my third booster, used.

Im going through the “add booster” instructions, setting up the booster hardwired, shows up perfectly, than the instruction say to un-plug, find location and then plugin power again. The new one ends up with permanent red indicators light, even when I move the new one side-by-side to the wired one … am I missing something?

thank you, stephan