Sony HT-S500RF Operating Instructions Manual page 34

"PRTCT" appears in the front panel
display of the subwoofer, the sound
is muted, and buttons on the
remote control or subwoofer other
than  (power) do not work.
 The protection feature is activated.
Press  (power) to turn the system
off and disconnect the AC power cord
(mains lead) and check the items
below.
– Make sure that the ventilations of
the subwoofer are not covered and
turn on the system after a while.
– When the system is using the USB
connection, remove the USB device
and turn on the system. If the
system operates properly, the
current of the connected USB device
is over the maximum output current
of the system 500 mA, or the USB
device may have an abnormality.
The front panel display of the
subwoofer is not lit.
 Press DIMMER to set the brightness to
"BRGHT" or "DARK" if set to "OFF"
(page 9).
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 allows those
parts to operate properly. For the
locations of the sensors and remote
control receiver, refer to the
operating instructions supplied with
the TV.
34
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The system does not work properly
("DEMO" appears in the front panel
display).
 The system is in demo mode. To
cancel demo mode, reset the system.
Press and hold  (power), +, and
on the subwoofer for more than 5
seconds (page 35).
When you change to the TV input
from the USB input by pressing
INPUT, the message appears.
* This screen is an example for English.
 Select the TV program by using the TV
remote control.