① Make sure the TV is turned on. ② Make sure the remote control is equipped with batteries. ③ Brightness of sunlight may affect the infrared function of the remote control. We recommend covering the sun with your hands when using the remote control in strong light. ④ If the remote control does not respond: a. To eliminate the distance aspect: place the remote control close to the TV, point it at the TV's sensor, the display should change from red to green. b. To check if your remote control is working normally: Turn on the camera on your cell phone, point the end of the remote control with the IR emitter at the cell phone camera screen. Press and hold one of the buttons on the remote control. When the remote control sends a signal, when you press the buttons on the remote control, a light should flash on the phone screen, which means the remote control is working normally. ⑤ If both remote controls work, but the TV cannot be turned on and no picture is displayed, please contact us.