- Press buttons [Mute => 'red' => TV] on the remote control one after another in sequence.
- User 'red' button to select a menu line of digit.
- Press 'Up | Dn' button to select further parameter.
- Press 'Vol Up | Vol Dn' button to change the data value to selected item.
- Press "OK' button to store the changed data to memory.
- Press 'TV' button to exit Service Mode.
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