LG -D620J User Manual page 194

Troubleshooting
Message
Charging
error
Number not
allowed
Impossible
to receive /
send SMS &
photos
Files do not
open
The screen
does not turn
on when I
receive a call.
78
Possible causes
Battery is not
charged.
Outside temperature
is too hot or cold.
Contact problem
No voltage
Charger defective
Wrong charger
The Fixed dialling
number function
is on.
Memory full
Unsupported file
format
Proximity sensor
problem
Possible corrective measures
Charge battery.
Make sure phone is charging at a normal
temperature.
Check the charger and its connection to
the phone.
Plug the charger into a different socket.
Replace the charger.
Use only original LG accessories.
Check the Settings menu and turn the
function off.
Delete some messages from your phone.
Free more internal memory by transferring
the file to the SD card.
Check the supported file formats.
If you use a protection tape or case, make
sure it has not covered the area around the
proximity sensor. Make sure that the area
around the proximity sensor is clean.