Specifications

Appendix
17
17-6
Troubleshooting
[ General
Troubleshooting
Problem Possible Cause Solution
Handset won't
power 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
(P.17-4).
Operation is
restricted after
power on
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.
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.
Operation is
restricted
Keypad Lock may be
active.
Cancel Keypad Lock ( P.2-14 ).
Function Lock may
be active.
Cancel Function Lock ( P.13-2 ).
Battery strength
indicator flashes
when not
charging
Ambient temperature
may be outside 5oC
to 35oC.
Use within an ambient
temperature of 5oC - 35oC.
Saved entry/
folder does not
appear on
handset
Entry/folder may be
set to Secret.
Activate Show Secret Data
(P.13-3).
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 DM007SH-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