Hi my name is Roety,
I can help you with your issue ,
The cable box signal is received from a round cable called coaxial cable. The guide is sent to the cable box through the coax cable. The HDMI cables sends the picture to the TV.
The Tv does not download TV guide listings , just the box does. That would be a cable company/box issue not a TV issue.
Some TVs have a built in TV guide for when you recieve signals from an antenna (not cable).
If thats what you are referring to don't bother .
Use the cable box guide .
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Thanks I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771