I updated the R2 to the latest firmware which seemed to work fine for a day, but then the R2 spontaneously couldn't detect an internet connection. Contacted ISP who reset the modem and said everything is fine; I can bypass the R2 by unplugging the ethernet cable and plugging it into my laptop and speeds are great.
I did a soft factory reset, and it still says no internet connection detected during the setup wizard. I can't finish the setup.
What should I do next? Does this router need to be replaced?