Sony HT-RT4 Operating Instructions Manual page 28

 Enable the Control for HDMI
function on the TV. For details, refer
to the operating instructions of your
TV.
 Wait a while, and then try again. If
you unplug the system, it will take a
while before operations can be
made. Wait for 15 seconds or
longer, and then try again.
 Make sure the devices connected to
the system support the Control for
HDMI function.
 Enable the Control for HDMI
function on the devices connected
to the system. For details, refer to
the operating instructions of your
device.
 The type and number of devices
that can be controlled by the
Control for HDMI function is
restricted by the 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
 Tuner-related devices: up to
4 devices
 Audio system (receiver/
headphone): up to 1 device (used
by this system)
If "PRTCT" appears in the front panel
display of the Subwoofer.
 Press  to turn off the system. After
the display turns off, disconnect the
AC power cord (mains lead) then
check that nothing is blocking the
ventilation holes of the Subwoofer.
The front panel display of the
Subwoofer is not lit.
 Press DIMMER to set the brightness
to "BRIGHT" or "DARK", if set to
"OFF" (page 9).
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Sensors of the TV do not work properly.
 The system 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 the wireless
communication. Move the system
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.
The system does not work properly.
 The system may be in demo mode.
To cancel demo mode, reset the
system (page 28).
Reset
If the system still does not operate
properly, reset the system as follows.
Be sure to use the touch keys on the
Subwoofer to perform this operation.
1
Hold down INPUT, touch VOL –
and  simultaneously for
5 seconds.
"RESET" appears in the front panel
display, and the settings of the
menu and sound fields, etc. return
to their initial status.
2
Disconnect the AC power cord
(mains lead).
3
Reconnect the AC power cord
(mains lead), then touch  to turn
on the system.