Check power level of the batteries and replace with new batteries if needed.
Check with the polarities of the batteries .
Check with lens of the remote control ensure signal to TV is not blocked

Please aim the remote into a smartphone or cellphone camera.

1. Pick a device to use: Digital Camera – or your Smart Phone and then turn the camera on.
2. Point the end of the remote control with the IR emitter at the camera or camcorder lens.
3. Look at the viewfinder or LCD screen.
4. Press and hold one of the buttons on the remote control.
See if you see a blinking light when you press a button on the remote from the front of the remote while looking at the screen on your phone.