@tiride
The Roku Voice remote should connect to a Roku TV. They are compatible with all Roku TVs. A Roku device (including a Roku TV) does not need to be connected to a network for the Voice Remote to be paired to it. The Roku app remote needs an existing network connection, but not the Voice Remote. It will pair as long as both the Roku device (including a Roku TV) and the remote are both working properly.
For future reference, a factory reset is a last resort. Generally you wouldn't do that if something else could reasonably be tried.
So, you had an issue with the Roku TV scrolling. That could indicate a problem with the remote. Perhaps it needed new batteries. And, if a set of new batteries didn't work, the next step would be to replace with other new batteries from a different package. They can go bad just sitting, and a different pack of batteries reduces the odds of that.
Failing that, if the batteries are truly good, and the remote is the problem, we've not go a situation where two different kinds of remotes went bad. That's very unusual. Possible, but very unusual.
One option is run to Walmart and get a new Voice Remote. If it pairs, then your Voice Remote went bad. If not, well, we'll go down that road when we need to. Anyway, you should be able to return the remote if it didn't resolve the issue.
Another line to pursue is: how certain are you it was the IR sensor on the TV that was bad? You provided no information regarding that conclusion. Is it possible an incorrect conclusion was reached? After all, you can't simply run to Walmart and pick up an IR remote that works with Roku and expect it to work with a Roku TV. The codes for Roku TV (there are two different code sets) are not the same as the ones for standard Roku devices. (There are three IR code sets for Roku. One is for standard non-stick Roku devices. Two are for Roku TVs. They are all incompatible with each other.)
Does this information offer you a path forward?
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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