The issue you have is that HDMI CEC is disabled when you set up the remote to control your TV, volume and power now become commands to your tv and volume is no longer controlled on the HDMI cable. You must go into settings/advanced settings/reset enter the code they give you, reset your Roku and begin setup from scratch. I found that the remote was still controlling the TV until I got far enough in the setup to choose not to control my tv and after setup was complete, I could again control the volume on my receiver, but not the power or volume on my tv. Good luck!