If the front of the Roku is blinking, then it's probably receiving IR interference from outside source. It's bombarding the front of the Roku, so it won't accept its own remote commands. Stand in front of the Roku at different angles, so you pinpoint where the interference is coming from. Take the batteries out all remotes in the room, re-introduce each one at a time until you find the culprit. Check for remotes under cushions or books?
Edmund
Roku Community Streaming Expert
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