Toyota TNS400 Owner's Manual page 51

If the following fail to solve the problem, contact the place of purchase.
Problem
The screen is dark for a brief
period when the power is
turned on at low temperatures.
The display is distorted for a
short while after the power is
turned on.
No sound comes out.
Sound comes out of only
one side (left or right, front
or back).
The sound quality does not
change even after making
adjustments.
A CD will not go into the
deck.
A CD cannot be played.
50 TNS400
Possible reason
This is a characteristic of LCDs.
This is a characteristic of LCD
backlighting.
The volume is poorly adjusted
or MUTE is on.
The music is muted when the
TomTom is attached to the
main unit and when:
- voice guidance is given
- talking in hands-free mode*
A speaker wire is
disconnected.
Volume is poorly adjusted.
The adjusted audio quality
is not included in the radio
broadcast or disc.
The power is not turned on.
A disc is already inserted and
you are trying to insert a
second disc.
There is water condensation in
the equipment.
There is a large scratch or
warp in the CD.
The CD is very dirty.
The CD is upside down.
A non-supported type of CD
has been inserted.
Corrective action
This is not a malfunction. Wait
for a brief period.
This is not a malfunction. The
display will stabilize after a
brief period.
Turn the [VOL] rotary knob
and check the volume. Or
cancel MUTE.
This is not a malfunction.
The music can be heard again
when the voice guidance
finishes or the hands-free
mode is turned off.
Check the connections of the
speaker wires.
Check the balance and fader
adjustments.
Check by changing the radio
station or disc.
Turn the vehicle ignition
switch to [ACC] or [ON].
Eject the previously inserted
CD and insert the preferred
CD.
Do not use the equipment for
a while and then try using it
again.
Insert a different CD.
Clean the CD.
Insert the CD with the proper
orientation.
Insert a CD that is supported
by the deck.