LG KE520 Service Manual page 86

Power is supplied to
Connection between
FPCB and boards is OK?
Paths of LED control
signals are OK?
After changing the board,
Change the board
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the board?
Yes
Yes
Yes
FPCB OK?
Yes
LED is OK?
Yes
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4. TROUBLE SHOOTING
No
Refer to
Power On Trouble
No
Reconnect FPCB
No
Re-solder
Connector
No
Replace the FPCB
No
The LED is broken.
Change the LED.
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