Sony BRAVIA KD-48A9BU Guía De Referencia página 6

2
Remove the screws from the rear of the
TV.
Note
• Be sure to store the removed screws and reuse when
attaching the Wall-Mount Bracket to the TV set
(SU-WL850 only). Keep the screws away from small
children.
Troubleshooting
General troubleshooting for issues like: black
screen, no sound, frozen picture, TV does not
respond, or network is lost, do the following
steps.
1
Restart your TV by pressing the power button
on the remote control for about five seconds.
The TV will restart. If the TV does not recover,
try unplugging the mains lead. Then press
the power button on the TV, and release it.
Wait for two minutes, and plug in the mains
lead.
2
Refer to the Help menu by pressing HELP on
the remote control.
3
Connect your TV to the Internet and perform
a software update. Sony recommends you to
keep your TV software updated. Software
updates provide new features and
performance improvements.
4
Visit Sony support website (information
provided at the end of this manual).
When you plug in the TV, the TV may not be
able to turn on for a while even if you press
the power button on the remote control or
the TV.
It takes time to initialize the system. Wait for
about one minute, then operate it again.
The remote control does not function.
• Replace the batteries.
6 GB
The parental lock password has been
forgotten.
• Enter 9999 for the PIN and enter the new PIN.
The screen becomes darker while watching
TV.
• If the whole image or part of the image
remains still, the screen brightness will be
gradually reduced to prevent image retention.
This is not a malfunction of the TV.
You are concerned about image retention.
If the same image is displayed repeatedly or for
long periods of time, image retention may
occur. To reduce image retention, we
recommend that you turn off the TV normally by
pressing the power button on the remote
control or the TV.
Note
• Perform Panel refresh only when image retention is
particularly noticeable. Avoid performing Panel
refresh more than once a year because it may affect
the usable life of the panel.
• Images that include clocks, logos and bright colours
(including white) easily cause image retention. Avoid
displaying these types of images for long periods of
time, otherwise image retention may occur.
A white line appears on the screen.
• Panel refresh automatically runs after the TV
has been used for long periods of time to
reduce image retention. Panel refresh starts
after the TV is turned off and takes about one
hour to complete. A white line may be
displayed on the screen during the Panel
refresh. This is not a malfunction of the TV.
The message [Panel refresh did not finish...] is
displayed.
When i) the TV is turned on, ii) the mains lead is
unplugged, or iii) the room temperature falls
outside of the range between 10 ºC and 40 ºC
during the Panel refresh, the Panel refresh is not
completed. Please avoid the above three
conditions during the Panel refresh.
For more information on
troubleshooting, refer to the
Help Guide.