Samsung PN50A550S1FXZA User Manual page 64

How to Reset the TV after the V-Chip Blocks a Channel ("Emergency Escape")
if the TV is tuned to a restricted channel, the V-Chip will block it. The screen
will go blank and the following message will appear:
1 Press the ENTER button to select OK.
To resume norma! viewing, tune to a different channel using CH A or
OH v button. Under certain conditions (depending on the rating of the local TV
programs) the V-Chip might lock out all the channels. In this case, use the
V-Chip function for an "emergency escape":
Enter your PIN, then press the ENTER button, and press the A or T button to
temporarily disable the V-Chip Lock.
_,_ If you forget the PiN, press the remote-control buttons in the following
sequence, which resets the pin to 0-0-0-0 : Power Off. -_ MUTE _ 8 _ 2 -_
4 -_ Power On.