Solved
remote volume-up button goes to maximum involuntarily
New problem with Roku Enhanced Voice Remote (Model RC506; rtn.4228) Pressing the side volume UP button, just once, sends the volume flying up to maximum, as if we were holding the button depressed ...
First thing to try is to restart your Roku. [Note: If you have a Roku TV with "Fast TV Start" enabled, turning it off/on just puts it in/out of a standby mode and does not give you a full restart.]
Depending on your Roku model you'll find the "System restart" option under "Settings > System > Power" or if you don't have a "Power" option, under "Settings > System".
If a restart doesn't do it, or if you don't have sufficient control with the remote to navigate the Roku menus, you can also restart by pulling the power plug to the Roku for a few seconds then plugging it back in and waiting for it to restart.
