Why is my Smart TV’s remote control not working even with new batteries?

Check and make sure the remote is enabled on your television. Many televisions have a setting that can disable the remote.
Check the pairing mode of the remote with the television. Some remotes need to be paired with a television, meaning the signal from the remote needs to be connected in order for it to work.
Check the range of the remote ad make sure you are close enough to the TV so the signal can be received.
Replace or reinsert batteries in your remote.
Look for any damage to the remote or obstruction that could interfere with the remote beam.
Try connecting and using an alternate remote such as a smartphone remote app for your TV or a universal remote.