Reference Section; Troubleshooting; Symptom And Solution; Symptom And Solution - Digital Only - Toshiba 22AV700A Owner's Manual

Troubleshooting

Before calling a service technician, please check the
following table for a possible cause of the symptom and
some solutions.

Symptom and solution

TV will not turn on
• Make sure the power cord is plugged in, then
press or .
• The remote control batteries may be dead.
Replace the batteries.
No picture, no sound
• Check the antenna connections.
No sound, picture OK
• The sound may be muted. Press
• The station may have broadcast difficulties. Try
another channel.
Poor sound, picture OK
• The station may have broadcast difficulties. Try
another channel.
Poor picture, sound OK
• Check the antenna connections.
• The station may have broadcast difficulties. Try
another channel.
• Adjust the PICTURE menu.
Poor reception of broadcast channels
• Check the antenna connections.
• The station may have broadcast difficulties. Try
another channel.
• Make sure the Colour system is properly set.
Teletext problems
• Check the antenna connections.
Good performance of text depends on a good
strong broadcast signal.
Multiple images
• The station may have broadcast difficulties. Try
another channel.
• Antenna reception may be poor. Use a high
directional outdoor antenna.
• Check if the direction of the antenna has changed.
Poor Colour or no Colour
• The station may have broadcast difficulties. Try
another channel.
• Adjust the Tint and/or Colour in the PICTURE
menu.
The remote control does not operate
• Remove all obstructions between the remote
control and the remote control sensor on the TV.
• The remote control batteries may be dead.
Replace them with new ones.
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Reference section

Reference section
Some pixels of the screen do not light up
• The LCD display panel is manufactured using
an extremely high level of precision technology,
however, sometimes some pixels of the screen
may be missing picture elements or have
luminous spots. This is not a sign of a malfunction.
The picture brightness varies when you switch the
TV on.
• If you switch the TV on at 0°C and under, wait
until the warms up.
The brightness of the screen comes down, or flickers
of the screen are caused, or some parts of the screen
do not light up.
• When you just buy and start to use this TV, a
flickering may be caused in the screen. In this
case, switch off the TV, then switch on it again to
cure the condition.
+, – or .
• The cold cathode fluorescent lamp used for the
back light on this TV has longevity. When the
brightness of the screen comes down, or the
flickers of the screen are caused, or some parts of
the screen do not light up, it may reach the end of
its life. Contact a service technician.
Symptom and solution
Poor picture
• Check the antenna connections. Make sure it is
aligned to the correct broadcast direction.
• Check the signal level and quality in the Manual
Scan menu.
• If you use any kind of amplifier to boost the signal
level, check whether it works well, and ask for
help from the antenna installer.
No picture
• Use the Manual Scan menu to rescan this
channel.
• Try another channel.
• Reduce RF amplifier gain if connected to RF
booster.
No sound from DIGITAL AUDIO
• The sound may be muted. Press
• Make sure the TV is adjusted to the correct Audio
Track.
• Use the Manual Scan menu to rescan this
channel.
• Try another channel.
Not all channels are available after using the Auto
Scan when tuning the TV for the first time.
• This symptom is caused by unexpected frequency
offset.
• The Analogue Channel Fine Tune menu to scan
for the missing channels. The TV scan receive
these channels by the Auto Scan menu most
of the time, but we suggest that you use the
menu when tuning the TV for the first time. Once
the TV picks up the signal, all the transmission
parameters will be stored in the internal memory.
- digital only -
+, – or .