I was setting up parental guide on my direct tv and clicked lock and it says there was a code already set up.

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@Hillstreet wrote:

I was setting up parental guide on my direct tv and clicked lock and it says there was a code already set up. I did not set up a code my system is new. Now I can't watch anything because I can't unlock it

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You need to call DirecTV to reset your Passcode.

Be prepared to prove that you're the primary account owner.