I have the same RF problem with my both 890's operating a directv HR20-700. In December, Both started behaving badly simultaneously. Worked great for four year.The Directv up down left right recieves two commands. resetting the response setting to 1 or 0 in the troubleshooting setup doesn't help. Shutting down all home wireless applications and systems doesn't help. Reinstalling firmware doesn't help. uninstalling and restalling the device doesn't do any good.

My initial assessment. Software makes installation of devces and activities easy. Hardware is weak.