SoftBank 830CA User Manual page 291

Troubleshooting
Problem Possible Cause & Remedy
A snapping Are you in a location with weak
sound occurs signals? This sound occurs when
during calls. signals are weak and handset
switches to a different area.
Handset is slow This may occur when there are
to react when large amounts of data saved on
keys are handset, or when large amounts
pressed. of data are being transferred
between handset and memory
card.
Cannot hear Is Keypad sound set to OFF?
key operation
Is handset in Manner Mode?
tones.
Side keys are Is Keypad Lock active?
inoperable
Is Side key guard set to ON?
when handset
is closed.
There is no Has Dial Lock or Keypad Lock
response when been set?
keys are
pressed.
14
14
-8
Refer to Problem
- Nothing is
shown in
Display.
-
Display is hard
to see.
P. 13-14
P. 1-17
P. 4-4
The Display
P. 1-19 backlight do
not light.
P. 4-3,
P. 4-4
Nothing is
shown in
Illumination
Panel.
Possible Cause & Remedy
Is power saving mode activated?
If handset is left in a very hot place,
it may automatically shut down.
If this happens, move handset to a
location at an appropriate
temperature (5 to 35°C) and wait
for a while until the keys become
operable again.
Is Brightness under Backlight set
to Dark?
Has Screen Filter been set to ON?
You can turn Screen Filter on/off
by pressing and holding 8 .
Is Lighting under Backlight set
to OFF?
Press and hold 5 to turn on/off
the backlight.
Is Illumi set to OFF?
Refer to
P. 13-7
-
P. 13-7
P. 13-6
P. 13-7
P. 13-7
P. 13-10