Troubleshooting
27
English
Troubleshooting
Before requesting service or assistance, please follow
these simple guides to resolve the problem.
If an error message appears, follow the message’s
instructions.
If the problem still persists, please contact your local
Panasonic dealer for assistance.
Picture
Why is there no picture or just a blue, black or
snowy screen being displayed?
Check if the power cord is plugged in and the TV
is turned on (front red LED light should be on; not
blinking).
Press the
INPUT
button on the remote control to
select the correct input source.
Ensure all connections are correct and secure.
When using external video source, such as a Cable/
Satellite box or DVD player, check that the device is
on and functioning correctly.
Press
MENU
on the remote control. If the menu is
displayed, then the TV is working; recheck above
steps.
Why doesn’t the picture look like it is in High-
Definition?
Press
INFO
on the remote control to confirm the
type of signal being received. HD signal should be
720p, 1080i or 1080p.
Select a High-Definition channel from your HD
source (Cable, Satellite or fiber optic service). HD
channels sometimes broadcast non-HD content.
Ensure that your HD source (HD box, Blu-ray
player, etc.) is connected to the TV with an HDMI or
COMPONENT cable and set to output an HD video
signal.
Why do black bars appear on the top and bottom
and/or sides of the screen?
Change the format (aspect ratio) of the picture by
pressing
FORMAT
on the remote control (p. 13).
Check the aspect settings on your external video
source, such as Cable/Satellite box, DVD/Blu-ray
Disc player, etc.
Note: Some content, such as film-based movies, are
available in extra-wide format. Top and bottom bars
are unavoidable.
Why is the picture snowy when [ANTENNA/Cable
In] is selected?
When using a cable service (without a box), check
that all connections are secure.
When using a cable or satellite box, change the
connection to COMPOSITE, COMPONENT or HDMI
(p. 10).
If you’re using an antenna, then check that
connections are secure. Change the position or
direction of the antenna and check the [Signal
meter] (p. 13).
Why is the picture chaotic and/or torn and/or with
a buzz in the speakers?
Check if electrical products such as kitchen
appliances, fluorescent lights or light dimmers are
nearby. They may interfere with the TV’s picture.
Try viewing a picture from another device, such as a
DVD player or a game console, to narrow down the
source of the problem.
Why is there a black box on the screen?
Change settings of Closed Caption (CC)
(p. 13, 26).
Why is the screen blank and the power indicator
blinking?
The TV has gone into shutdown mode to protect
itself. Try unplugging it for a few minutes and
connecting it again. If there was a temporary power
surge on the AC line it may now be OK. If the
blinking returns, please contact your local Panasonic
dealer or Panasonic Service Center for assistance
(p. 30).
Why do some small spots on the screen remain
bright or dark?
The TV panel is made up of a few million pixels
and is produced with advanced technology through
an intricate process. Sometimes a few pixels may
be bright or dark. These pixels do not indicate a
defective panel and will have no impact on the
performance of the TV.
Sound
Why is there no sound coming from the TV?
Make sure the volume is up and MUTE is off.
Check that the correct SAP (Secondary Audio
Program) is selected by pressing
SAP
on the
remote control (p. 13).
If the TV is connected to a Home Theater via optical
cable, then: Check the connection, the audio system
is on, the correct input is selected.
Check [HDMI1-2 in] analog/digital audio settings
(p. 18).
Why is the sound unusual, distorted, low volume
or in another language?
Check that the correct SAP (Secondary Audio
Program) is selected by pressing
SAP
on the
remote control (p. 13).
Check that all connections of external equipment
connected to the TV are secure.
When using Cable or Satellite box, check the
device’s audio settings (example: try changing the
box’s Audio Range to “narrow”).
Why is there a clicking, ticking or buzzing sound
coming from the TV unit?
When TV power is turned on or shut off there are
electrical components that make a click sound. This
is normal.
Changes in the temperature and humidity of the
room may cause thermal expansion and contraction
that can produce sounds. This is not a sign of faulty
operation or a malfunction.
Summary of Contents for Viera TC-40D400C
Page 31: ...Note ...
