When I go to select a tv channel within the TV guide section, I’m not able to select anything. I can use Netflix, Stan, etc., but I can’t view normal tv programs. I’ve tried rebooting, turning everything on/off.
Hmm, that's a strange one. Have a try at doing a channel scan: Menu-->Manage-->Settings-->Channels-->Full Channel Scan
and running a Diagnostics test and let us know how you go.