49
Appendix
Troubleshooting
Symptom
What you should check
IS12T does not turn
on.
• Is the battery pack installed correctly?
• Is the battery pack dead?
Cannot charge the
battery pack. (LED
indicator does not
light or flash.)
• Is the battery pack installed correctly?
• Is the power plug of the AC adapter plugged
correctly into a power outlet or vehicle cigar
lighter?
• When using the AC adapter (sold
separately), is the supplied microUSB-
USB conversion cable connected correctly
to IS12T and the AC adapter (sold
separately)?
• If you are using the supplied microUSB-USB
conversion cable, is the computer turned
on?
IS12T becomes
warm during
operation or
charging.
• Your IS12T, battery pack or adapter might
heat up, for example, during operation or
charging, or when watching video for a long
time while charging the battery. However,
you can continue to use your phone since
there is no problem in terms of safety.
Screen turns on and
off during charging.
• Screen might turns on and off if you start
charging the completely empty battery.
However you can continue to charge the
battery since there is no problem.
Screen is not
displayed even
if sleep mode is
deactivated.
• When the battery becomes completely
empty, goodbye screen appears and the
power turns off even if in sleep mode.
Charge the battery and then perform
operation.
Symptom
What you should check
Battery charge life is
short.
• Are you leaving the phone for long periods
in an area that is outside the service area?
Outside the service area, the phone
searches for a connection, which consumes
more electric power than normal.
• Battery pack charge life depends on
conditions of use and the level of battery
pack deterioration.
• The battery pack is a consumable item.
Repeated charging shortens the battery
pack charge life.
Buy a new specified battery pack if the
usage time becomes much shorter, even
after being fully charged, than when the
battery was first bought.
Power cuts off or
IS12T restarts.
• Dirty battery pack terminals can cause poor
contact, resulting in power turning off.
Use a dry cotton swab to wipe off any dirt
from the battery pack terminals.
The correct
operation is not
performed when I
tap.
• Are you wearing gloves?
• Are you tapping with the tips of your
fingernails or with an object?
• Is a protective sheet affixed to the display?
Some types of protective sheets may
interfere with proper operation.
• The display of IS12T uses an electrostatic
touch panel. Touch the display with your
finger to perform operations.
Nothing happens
when I touch the
display
• Turn the power off and then back on again.
Screen response is
slow when I tap the
screen or press a
button.
• This can happen when you are saving
a large volume of data to your IS12T or
transferring a large volume of data.
Data is not displayed
normally or normal
Touch screen
operations are not
possible.
• Restart your IS12T.
IS12T̲BasicManual̲.indb 49
IS12T̲BasicManual̲.indb 49
2011/09/02 18:48:19
2011/09/02 18:48:19