LG P713TR User Manual page 198

Troubleshooting
Message
SD card not
working
The screen
does not
turn on
when I
receive a
call.
No sound
Hang up or
freeze
92
Possible causes
FAT16, FAT32 file
system supported
Proximity sensor
problem
Vibration mode
Intermittent
software problem
Possible corrective measures
Check SD card file system via card
reader, or format SD card using the
phone.
If you use any protection tape or case,
check to see if it has covered the area
around the proximity sensor. Make
sure that the area around the proximity
sensor is clean.
Check the settings status of the sound
menu to make sure you are not in
vibrate or silent mode.
Remove the battery, insert it again and
switch on the phone.
Try to perform a software update via
the website.