Chime Pro won't pair

My Chime Pro (about 4 years old) doe not seem to pair with my Ring Hub or WiFi. It has been offline since I changed to a new router. But after reconnecting my hub, video doorbells and router to work together, I am having trouble with the Chime Pro. I have tried connecting the chime pro on the chime network as well as through my WiFi, following the instructions on my mobile app. No luck so far. When I tried locating the Chime Pro closer to the WiFi router, ensuring that I had power to the cube, no LED lights appear, as if it is dead. Any suggestions?