My Roku TV, until recently, showed broadcast channels in the Live TV portion of the Roku Channel app. Suddenly, this week, they're gone. How can I get them to show up again in the Roku Channel app?
You can show all the streaming channels (Roku Live TV channels) as well as the Antenna/OTA channels when you have them enabled in your Settings and select Antenna Input on your RokuTV.
I do not believe you can access your Antenna/OTA channels through the Roku Channel Live TV guide. (At least I cannot and never have been able to on an Insignia RokuTV).
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In order to show both Antenna/OTA and Streaming Roku Live TV channels in same guide...
1. Settings/TV Inputs/LiveTV/Manage Channels/Disable (uncheck) Hide All Streaming Channels
2. From Home Screen, Select Antenna Input. (you should now see all OTA and Streaming channels and can further manage/hide/filter them accordingly.
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Feel free to post back with an update or if you still need more help.