Check the power cord and outlet
Replace the batteries in the remote
Make sure the TV is turned on
Verify the input source is correct
Inspect HDMI and other cable connections
Unplug the TV for 60 seconds and plug it back in
Reset the TV to factory settings
Check for a blown fuse or tripped breaker
Test with a different power outlet
Try a different HDMI cable or device
Update the TV firmware
Remove any connected devices and test the TV alone
Look for damaged screen, ports, or power button
Contact the manufacturer support
Take the TV to a qualified repair technician