I have a 3 year old Samsung 4K Smart TV. Recently, the remote doesn't work. Seemed if I held down the remote power button and when the tv rebooted, and I re-paired the remote, everything worked until you powered off the tv. When you turn back on the TV, you get different messages from the tv. Some of the messages are: it cannot find devices to pair with; it cannot connect to the keyboard (I don't have a keyboard, never have, just have the tv remote); no devices available. Sometimes it just boots to a black screen. In all cases, tv does not respond to any remote button presses. I've searched the community and have tried repairing, changing the batteries, resetting the remote, disconnecting power to the tv for 5 minutes. Nothing changes.