Who is your cable or sat service provider?
Or do you have coax going directly into the tv with no cable box?
If there is no direct connection via coax to the tv then the tv should not show any info as it is mearly a monitor at that point, now with your service provider like lets say you have cable service then ere will be a button on your cable remote to press that will display this info as will the channel guide, once I know your exact service provider I will be happy to list the exact steps in what is required for that info you want. As well please provide me with the cable box or remote model number so I can give you this exact info.
Untill the above info is listed no one can give you an exact answer, but I will be happy to as soon as I know who your service provider is or what model number of the cable box or remote, not all of them have an info button. Just as well the only info button that would work if there was one would be the one on your cable box remote and not the tv remote, unless using the tv freeview, just as well if programming info is not current or not displayed on the channel guide it is blank then no channel info will be given.