Press the Home button on the remote
Go to Settings
Select General
Select Reset
Enter the PIN if prompted
Confirm the reset
Wait for the TV to restart and complete the reset
If needed, perform a factory reset from the TV menu
Go to Settings
Select Support
Select Self Diagnosis
Select Reset
Enter the PIN if prompted
Confirm the reset
If the TV is unresponsive, power cycle it
Turn off the TV
Unplug it from the power outlet
Wait 30 seconds
Plug it back in
Turn the TV on
If you do not know the PIN, try the default PIN
Enter 0000
If the reset option is unavailable, check for model-specific instructions in the user manual