Troubleshooting Guide
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
General
Symptoms
Possible causes
What to do
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.
Source device has not
read the set-up data from
the display.
Connecting cable does not
have all the necessary
connections.
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.
Picture looks squashed or
stretched even though the
aspect ratio controls are
set correctly (for example
4:3 or 16:9).
Equipment feeding the
display is set to the wrong
aspect ratio.
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.
No picture.
Brightness and contrast
levels are set to minimum.
Increase the brightness
and contrast settings.
No sound
The volume is set to
minimum.
The mute is switched on.
Turn the volume up.
Press the mute button to
release 'mute'.
on that multiplex.
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