I have the same issue with a Roku stick remote. I just identified the high pitch as coming from the remote. Interestingly...lately the device (not the remote) has also been throwing the overheated warning quite often even with using an HDMI extender. I'm wondering if the whole product is entering the end of life? @RokuDanny-R can you help?
If you are unable to resolve the issue, please provide the serial number of the Roku device from Settings>System>About along with a summary of the issue you are experiencing. I'll be able to assist you further from there.
Yes, I’ve attempted the reset troubleshooting. That has not helped. The remote has been functioning on and off unreliably for months, but now no longer works at all. I’ve gone through an entire package of new batteries. I cannot get the Serial Number via settings > system > about because the remote doesn’t respond and just hisses