Specific operation method: press and hold the smart key+setting key, aim the remote controller at the TV screen, wait for the volume adjustment display to appear within 1 second, then release it quickly, and then test the power key and volume key of the remote controller to be used. Pay attention to the volume adjustment display. If the release speed is slow, you will not be able to control the TV remotely. At this time, it is necessary to repeat the previous operations to match.