In order to change channels you must be in the directory, channel line up. Move the highlighted bar over to the column with the numbers. "All Channels". Key in your channel. It will go to that channel.
It will not recognize a decimal on any free over the air channels.
All other buttons work also. Make sure you have new batteries in your remote.
I already bought a roku remote with buttons that said it would work but it does not.
You probably just bought the wrong remote.
Roku devices and Roku TVs (i.e. TVs with Roku capability built in) use different sets of infrared control codes. A direct-line-of sight infrared Roku "Simple remote" will not control a Roku TV. A manufacturer-supplied TV remote that comes with a Roku TV will not control a separate Roku device.
Roku TVs and all but some very old Roku devices can be controlled by remotes that communicate via WiFi-Direct instead of infrared. In the current Roku line those are the two Roku Voice remotes.
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That is incorrect. I work for Spectrum Cable, and all Roku TVs despite brand or year of manufacture, use the same code. I have been doing this since before ROKU, and can attest that they are all the same. I program cable remotes for them on a very frequent basis and they are all, in fact IR controlled, not RF.
You are correct that the external streaming ROKU devices are different than the "ROKU TV" remote. Some functions will work between them, but it is limited. It is because they use a different set of instructions; it has nothing to do with IR or RF. They are all IR.
Sorry but @makaiguy is right, I bought every brand of Roku tv IR remote but one, and I own TCL, insignia, and hisense Roku TVs. There is two tv code sets used, one which matches the Admiral tv code of old, and the other matches the Goldstar tv of old. The Admiral code set is used by the majority of Roku tv brands. Where the Goldstar is only used by Hisense and Sharp Roku tvs. But Hisense & Sharp accept both code sets, that's why you think there is only one. My TCL remote works on the Hisense, but the Hisense remote has no effect on the TCL or the Insignia Roku TVs.
Edmund Roku Community Streaming Expert
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@makaiguy Sorry I know I am responding to a two month old post but if I understand correctly a TCL Roku TV can be controlled by a WiFi-Direct remote and can also be controlled by an IR remote such as the Insignia remote. Is that correct? I don't have a remote problem but I am just curious.