Yes. Repaired to tv. I can tell the button is broken. It clicks when scrolling up the volume, but when trying to scroll volume down button is flat and no clicks. Volume up works. The separate mute button works. I have another roku device and no problem w remote. Purchased at best buy.
It sounds like the Volume down connection on the remote's volume rocker switch has gone dead.
TV controls on the remote (power toggle, mute toggle, volume up/down) are sent to the tv via infrared signal. If you have a digital camera (including one built into a mobile phone) you can confirm IR operation by pointing the remote at the camera lens and observing in the camera view screen. A working IR signal from the remote should be viewable on the camera screen.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X