Toyota TNS400 Owner's Manual page 52

Problem
There is a point of light on the
display.
*: Depending on your mobile phone, the mute function may not work correctly. If it doesn't,
press the [MUTE] button on the main unit. Also, refer to the "tomtom" web site for details on
applicable phone models.
Possible reason
At least 99.99 % of the pixels
on the LCD panel are effective,
but it is possible that 0.0 %
of the pixels may not light or
may stay lit.
Corrective action
This is not a defect, so please
use the equipment in this
condition.
TNS400 5