Refer the following instructions.
- If you have multiple TVs, you may be using a remote that is programmed for another TV. Check that you’re using the remote that was set up for the TV you are trying to control.
- Something may be blocking the path to the device you want to control, you may not be pointing at the sensor on the device, or you may be too far away. Open cabinet doors and remove any other obstacles that may be between the remote and the device.
- Point the remote directly at the sensor on the device. Be sure you are within 8 meters or 25 feet of the device you want to control.
- The device you are trying to control may not be programmed into your remote.
- Your TV settings may have been accidentally changed. Using the remote control that came with your TV, check that your TV is currently set for the input mode you are trying to control.
- There may be a loose HDMI connection. Check that HDMI connections are secure.