ViewSonic N2635w-1M Service Manual page 22

Parental Menu — To set up Parental Control options
It is active in all input sources; however, when in AV, S-Video, YPbPr, HDMI, or VGA
source, the TV option on the left does not appear.
Enter password and the screen below will show. (The default password is 0000.)
•
Channel Block: To block channels. Use ▲▼ to select the channel you want to block, and
then press ENTER to block or unblock it.
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N2635w-1M