Possible Causes - JVC LT-32HA48U Guide D'utilisation

Symptoms
Picture blocking or freezing.
Sound breaking up.
Some channels are missing.
Any or all of the above
faults.
Multiplex
DVB-T (Digital Video Broadcasting - Terrestrial) is broadcast in groups of channels on one common frequency. This
arrangement is known as a Multiplex.
There are several multiplexes in the DVB-T system, each carrying a group of channels.
If the signal level on a particular multiplex frequency is poor you may lose the whole group of channels on that
multiplex.
Symptoms
Picture is the wrong size
or the source device
(computer, DVD player,
set top box and so on) will
not let you set up the pixel
resolution the display can
reproduce.
Picture looks squashed or
stretched even though the
aspect ratio controls are
set correctly (for example
4:3 or 16:9).
No picture.
Digital Terrestrial TV

Possible causes

Weak signal or wrong type of aerial.
Not receiving one or more digital
multiplex frequencies.
Interference or other problem caused
by passing aerial signal through other
equipment.
General
Possible causes
Source device has not read the set-up
data from the display.
Connecting cable does not have all the
necessary connections.
Equipment feeding the display is set to
the wrong aspect ratio.
Brightness and contrast levels are set
to minimum.
Make sure the source type is set
correctly.
EN 17
Troubleshooting and Help Line
What to do
Try re-tuning.
Aerial may not be suitable for digital TV
broadcasts.
You may be in a place which does not get a
good digital TV signal.
Get an aerial rigger to check the aerial
system.
Try connecting the aerial directly to the digital
TV receiver and then re-tuning.
If some equipment has a radio frequency
modulator, switch it off or change the
frequency of it and re-tune the analogue TV.
(Please see other equipment's instructions
for how to do this.)
What to do
Avoid old cables and adapter devices. Use
only modern cables.
Re-start the source device after connecting
and powering up the display.
Change the graphics adapter in your
computer.
Check compatible video resolutions given in
these instructions.
On the equipment feeding the TV choose
the correct output aspect ratio such as 4:3
(old conventional) or 16:9 or 1280 x 720 or
1920 x 1080 pixels to match wide screens.
Increase the brightness and contrast settings
Select proper source input.