If the TV has no response, please follow the below instruction to do the troubleshooting:
1. Power cycle the TV. You could unplug the power cord from the socket and plug it back in.
2. Press the power button from another TV remote if you have a spare one.
3. Press the physical power button on the back of the TV.
If the issue cannot be resolved, please feel free to call the LETOU - 乐投 hotline for further help.