Replace the batteries or if they are new make sure the batteries are placed correctly (negative and positive facing the right way as per the diagram in the remote itself). Pointing the remote directly at the TV press a button any button the remote to test this has resolved the issue. If you are still having difficulties make sure you are with your product and contact Hisense Customer Support on 800 447 3673. Hours of Operation are Monday to Friday 8:30am to 7:30pm AEST and weekends from 9am to 5pm AEST