Sony HT-X9000F Operating Instructions - Page 58

Wireless functions (the BLUETOOTH function or subwoofer) are unstable.  Do not place metal objects other than a TV around the system. Music that you are not familiar with suddenly plays.  The pre-installed sample music may have been played. Press on the main unit to stop playback. The system cannot be turned off or [Advanced Settings] cannot be used./When pressing  (power), all the indicators flash and the system cannot be turned off.  The system may be in demo mode. To cancel demo mode, reset the system. Press and hold  (power) and - (volume) on the main unit for more than 5 seconds (page 58). The system restarts.  When connecting to a TV with a resolution that is different from that of the system, the system may restart to reset the picture output setting. Resetting the System If the system still does not operate properly, reset the system as follows. 1 Press HOME. The home menu appears on the TV screen. 2 Select [Setup] - [Advanced Settings] on the home menu. 3 Select [Resetting]. 4 Select the menu item you want to reset. 5 Select [Start]. To cancel resetting Select [Cancel] in step 5. If You Cannot Perform Resetting Using the Home Menu Press and hold  (power) and - (volume) on the main unit for more than 5 seconds. The settings return to their initial status. Note By resetting, the link with the subwoofer may be lost. In this case, perform "Performing the Wireless Connection of the Subwoofer (SECURE LINK)" (page 26). 58US