It sounds like your remote buttons may have worn out or become non-functional. You can check out replacement remote accessories on our website here: https://www.roku.com/products/accessories
If your device is still under warranty, our support team may be able to provide additional options. You can get in touch with us directly here: https://support.roku.com/contactus
Thanks for the note.
- Have you tried selecting different audio settings in Settings>Audio>S/PDIF and ARC to see if this makes any difference?
- Have you tried swapping out the HDMI cable and/or port on the receiver?
- Do you observe no audio at all, or only no audio from specific channels when using HDMI ARC?
- For the antenna issue, have you tried re-scanning for antenna channels, and restarting the TV from Settings>System>Power>System restart to see if this resolves the issue?
Feel free to send me a PM with more details about each issue you're running into, along with your Roku account email address and the serial number of your Roku TV from Settings>System>About. I'll take a closer look and see what other suggestions we can make.
Roku Community Manager