I had a Roku for 7 years- it stopped working so we got a new one less than a year ago. TV works fine. Internet works fine (1gig). Roku plugged in using Ethernet, etc. white light on cannot find Roku in any “Source” options or even to connect the device to my App Remote. I’ve tried doing the factory reset by holding the reset button in the remote and actual device- didn’t work. I changed remotes batteries- didn’t help. Unplugged everything (internet included) and replugged it all. Still cannot do or find anything. What do I do?
That button in the battery compartment of the remote isn't a reset button, it's used for pairing. Find the reset button on the Roku and with the power connected press and hold it for no less than 30 seconds. Do you have another TV you can try it on?