There are five different versions that had Roku 2 in their name. Only one (the 4210) is still considered operational and receives updates. All the others are labeled as Legacy and no longer supported. And while the 4210 was a really good player when it was released in Apr 2015, but it is woefully out of date compared to the newest players.
The light flashing when you press the remote button is normal. It should only flash when a button is pressed, or at least that's the way it works on my Stick 4K+ that I can see from where I'm sitting.
While your Roku 2 may or may not still be supported (probably not) you might consider that it's time for a replacement. Even if you don't have a 4K TV, you would see a significant performance improvement with a new Express 4K+. I don't recommend the basic Express, even if you don't have a 4K TV. For the small price difference the Express 4K+ is a huge step up from the Express.
Dan
Roku Community Streaming Expert
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