With the TV powered on complete the following steps:
1. Press and hold "Menu" button on the front of the TV (not using a remote.)
2. Press and release the "Power" button on the front of the TV.
3. Press and release the "Volume Down" button on the front of the TV.
This will bring up the service menu.
Using the buttons on the front of the TV, scroll down and select "Reset to Factory Defaults," which should be the fourth option. Wait a few seconds and all of your inputs should work again.
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