LG C3300 User Manual page 198

LCD does not turn on.
Remove and replace the battery and turn on the power.
If the phone still does not turn on, charge the battery and try
again.
An echo can be heard during connection with a certain
telephone in a certain area.
It is called 'Echo Phenomenon'. It occurs if the volume is too
high or caused by special properties (semi electronic telephone
exchange) of the machine on the other end.
The phone gets warm.
During long calls, or if games/Internet are used for a long time,
the phone may become hot. This is perfectly normal and has
no effect upon the life of the product or performance.
The bell does not ring, or lamp or LCD blinks only.
The phone is set to 'Vibrate only' or 'Silent' in the Profiles
menu. Please select 'General' or 'Loud'
Standby duration of the phone gradually becomes shorter.
Batteries have a limited life. When the battery lasts for half its
original time, it requires replacement. Only use authorised
replacement parts.
Usage time of battery becomes shorter.
If the battery time is short, it may be due to the user
environment, or large volume of calls, or weak signals.
C3300 User Guide