When the TV is acting up or not working as it should, even after trying to troubleshoot the problem, performing a 'Restart' can often resolve the issue. Keep in mind that 'Restart' and 'Reset' are not the same and have different functions.
Restart
Reset to Factory Defaults
Remote buttons you will use for this process are:
Note: Screen shots and Menu items may vary by model.
Note: You can also restart the television by unplugging the power AC cord, wait 1 minute, then plug it back in. After plugging it back in the LED indicator will be orange, wait until it turns red. Then turn the television back on.