Samsung UN19D4000 E-Manual page 73

If the Enter security key screen appears, go to step 6. If you selected an AP
5.
or wireless router that does not have security, go to step 8.
6. Enter the security key (Security key or PIN), and then select Done.
When you enter the security key (Security key or PIN), use ▲/▼/◄
N
/► buttons on your remote control to select number/characters. Press
ENTERE to enter the characters.
N You can also enter numbers by pressing the number buttons on your
remote control.
◀
N You should be able to find the Pass Phrase on one of the set up screens
you used to set up your router or modem.
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