Performing a Power Cycle
Locate the power supply for the TV and unplug it from the electrical outlet.
Press and hold the "Power" button on the TV for 60 seconds.
Plug the power supply of the TV back into the wall and press the "Power" button to restart the TV.
Perform a Factory Reset
Turn the television on.
Press and hold the reset button on the remote control. If your remote control doesn't have a reset button, press and hold the up arrow.
Press the "Power" button on the front panel of the television while holding the reset or up arrow button on the remote.
Release the reset or up arrow button on the remote and follow the setup instructions on the screen
Try these 2 steps if that does not work your problem is inside the tv.
You can also do a hard reset and unplug over nite.