When setting up the remote control for a device (adding a device), the remote control automatically copies the volume and mute buttons as follows: * If a device has its own volume buttons in the remote control library, these volume buttons will be used. * If a device has no volume buttons in the remote control library, the volume buttons of another device will be used automatically. * Try copying the volume and mute buttons from another device. For this, refer to chapter 4.2.4 'Copy volume buttons from another device.' If all above solutions provided do not solve the problem, please chat with us online (at the upper right corner), call our consumer support or contact your retailer.