Ap
pe
ndix
15
15-
6
Troubleshooting
[
General
Troubleshooting
Problem
Possible Cause
Solution
Handset won't
turn on
Was
"
pressed long
enough
?
Press
"
longer.
Battery may need to be
charged or replaced.
Charge battery or install a
charged battery.
Battery may not be
properly installed.
Install battery properly (
Handset won't
respond
Is
Switch On/Off
in
PIN Entry
On
?
If
On
, PIN is required. Enter
PIN according to onscreen
prompt.
Insert USIM Card
appears
USIM Card may not
be properly inserted.
Turn power off and check
that USIM Card is properly
inserted, then restart
handset. If the message still
appears, USIM may be
damaged.
The correct USIM Card
may not be inserted.
Make sure the correct USIM
Card is inserted. The inserted
USIM Card may not be valid.
There may be debris
on IC chip/terminals.
Clean relevant parts with dry
cloth and re-insert.
REFRESH
appears
and handset
returns to
Standby
Handset may have
been dropped or
subjected to shocks.
Handset failed to recognize
USIM Card temporarily. This is
not a malfunction.
Keypad won't
respond
Keypad Lock may be
active (
`
appears).
Cancel Keypad Lock (
Function Lock may be
active (
$
appears).
Cancel Function Lock (
Battery strength
indicator flashes
when not charging
Ambient temperature
may be outside 5
o
C
to 35
o
C.
Use within an ambient
temperature of 5
o
C - 35
o
C.
Saved entry/folder
does not appear
on handset
Entry/folder may be
set to Secret.
Activate Show Secret Data
(
Cannot use
Predictive
Show Secret Data
may be active.
Cancel Show Secret Data.
Handset/AC
Charger feels warm
Handset/AC Charger
may warm while
charging.
Unless handset/AC Charger is
too hot to touch, warmth is
considered normal. Always
avoid prolonged skin contact
to prevent burn injuries.
Handset may warm
during extended
periods of use.
Handset may warm
during Video Calls.
Cannot access
Memory Card files
Memory Card may
not be properly
formatted.
Use DM004SH-formatted
Memory Cards.
Clock settings
are lost
Did you leave handset
without battery
?
Clock settings remain even
when removing battery for
replacement, etc. However, if
handset is left with no battery
or an exhausted one for an
extended period of time
(approximately one hour),
Clock will need to be reset.
Problem
Possible Cause
Solution
