LG KF600w Service Manual page 114

START
YES
Is the voltage level of +VPWR
3.3 ~ 4.2V?
YES
Are all LEDs working ?
YES
Is Q305 working ?
YES
Main key backlight w ill work properly
Checking Flow
Checking Flow
NO
Check the soldering of each R andLEDS,
NO
NO
Charge battery
or replace if not wor king
Replace Q 305