how do i get the closed captioning to work

the closed captioning on my television has stoped working,and im looking for a way to fix it

I’d like to connect my tv to a wireless network.

Model number is LN46A630M1F. The product page indicates that the linkstick is not compatible with my model.

Difference between LN46A630 & LN46B630

Can you tell me everything that has been changed from the previous model (LN46A630) to this one (LN46B630). I’m trying to decide between the 2.

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