My TCL Roku TV's upgrade to 11.0 didn't cause any program guide problems. The icons on the program guide disappeared and there were just letters, in 5 to 7 days the icons started reappearing.
I have had the TV info guide disappear briefly or list more or less channels than it usually does. I've tried 3 different things, one of them has always worked:
1) go to "manage channels" in the settings menu. You can show or hide the Roku streaming channels, if a favorites list is turned on - the TV will automatically add channels from what you tune to and other channels you don't watch may not show up in your channel guide. I turn off the favorites list and hide the Roku streaming channels so only my antenna channels show up in the guide.
2) Since the guide information comes from the internet connection, check your network connection if the guide doesn't list anything. One time I found no network connection, static electricity or some fluky situation cleared out the connection. Unplugging the TV for a minute and plugging it back in cleared up the interference and my network connection properties showed up again, brought back all the guide information. Please check this before scanning for channels again, you may not need to rescan.
3) go to the main screen with the startup tiles. Move from 'Live TV' to one of the other tiles for a few seconds but don't open it. Go back to 'Live TV', wait until the picture displays in the small tile window and you hear sound, then open it to full screen. This has ALWAYS brought my guide info & descriptions back, as well as other picture & sound settings that may have mysteriously stopped working. Quirky, don't know why this works but it does!
For antenna channels make sure you have a good antenna with the cable and all it's connections to the TV being tight. Since the 10.5 upgrade my TV's signal strength meter hasn't worked as it should, some strong signals still show up with only 1 or 2 bars on the strength meter when they should be 4 or 5 bars while other strong channels show 4 or 5 bars as they should.
Remember these TV's are computers and do the same things computers do. The TV tuners are software digital tuners, not actual tuners like TV's used to have before these smart TV's.
