Samsung LT22A350ND-ZA - Manual (Page 65)

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How to watch a restricted program or movie
If the TV is tuned to a restricted program or movie, the Channel Lock will block it.
The screen will go blank and the following message will appear:
This channel is blocked by Channel Lock . Please enter the PIN to unblock Enter
the PIN to unblock. the program or movie.
N If you forget the PIN code, press the remote control buttons in the following
sequence in Standby mode, which resets the PIN to “0-0-0-0”: MUTE
→ 8 →
2 → 4 → POWER (on).