1. Make sure that the power outlet is still providing power.
2. Check if the power cable from the wall to the TV is securely attached.
3. Verify that the power switch on the wall outlet is switched on.
4. Try unplugging the power from the TV, wait for 10 seconds and then plug it back in.
5. Check your remote. Ensure batteries are inserted and in working condition. Try different remote codes from the user manual or check the website support section.
6. Try to reset your TV. Unplug the power cable for 10 seconds, then plug the power cable back in, and turn it on.
7. Contact the manufacturer if none of the steps have worked.