Samsung T27A750 E-Manual page 110

Rating: You can block TV programs based on their ratings. This function
TV
allows you to control what your children can watch. TV Rating displays a grid
with locks. The following categories are on the left side:
–
TV-Y: Young children / TV-Y7: Children 7 and over / TV-G: General
audience / TV-PG: Parental guidance / TV-14: Viewers 14 and over /
MA: Mature audience
Program Rating Lock
N
DVI mode(when a PC is connected).
◀
The default PIN number for a new TV set is "0-0-0-0".
N
is not available in HDMI,
English
Component or HDMI1/
TV-
▶