Sony HT-ST9 Manuel D'instructions page 46

 The type and number of devices that can be controlled by the
"BRAVIA" Sync feature is restricted by HDMI CEC standard as
follows:
 Recording devices (Blu-ray Disc recorder, DVD recorder, etc.):
up to 3 devices
 Playback devices (Blu-ray Disc Player, DVD player, etc.): up to
3 devices (including this system)
 Tuner-related devices: up to 4 devices
 Audio system (receiver/headphone): up to 1 device (including
this system)
"PRTCT," "PUSH" and "POWER" flash alternately in the front panel
display.
 Press  (on/standby) to turn off the system. After the indicator
disappears, disconnect the AC power cord (mains lead) and make
sure nothing is obstructing the ventilation holes of the system.
[BT TX] appears in the front panel display.
 Press RX/TX on the remote control to switch [Bluetooth Mode] to
[Receiver]. [BT TX] appears if [Bluetooth Mode] is set to
[Transmitter] (page 13). When you press RX/TX on the remote
control, [Bluetooth Mode] is switched to [Receiver] and the
selected input appears in the front panel display (page 24).
Sensors of the TV do not work properly.
 The Bar Speaker may block some sensors (such as the brightness
sensor), the remote control receiver of your TV or the emitter for
3D glasses (infrared transmission) of a 3D TV that supports the
infrared 3D glass system, or wireless communication. Move the
Bar Speaker away from the TV within a range that allow those
parts to operate properly. For the locations of the sensors and
remote control receiver, refer to the operating instructions
supplied with the TV.
46
US
Reset
If the system still does not operate properly, reset the system as
follows:
1
Press  (on/standby) to turn the system on.
2
Press HOME.
The home menu appears on the TV screen.
3
Select [Setup] - [Resetting] from the home menu.
4
Select [Reset to Factory Default Settings].
5
Select the menu item you want to reset.
6
Select [Start].
To cancel resetting
Select [Cancel] in step 6.