Missing Guide channel NBC 8.1

I am a new DVR user from the Tampa area and after install NBC shows up with
only the call letters and one long empty guide entry. I can select the channel and see whats on.
But, it won't record or show what's on.

NBC has a NFL playoff game on tomorrow and I would like to record it.

I tried to delete the guide and change to a nearby zip code but no luck.

Can someone help

According to the FCC, their transmitter tower is in Riverview, FL 33569.
Try using that zipcode as WFLADT 8.1 does show on tvlistings.zap2it.com for OTA broadcasts in zip 33569.

On the DVR web settings UI, click the circle icon under your HDHR

Great, I got it. Playoffs now set to recorded.

Thanks