LG KE590 Service Manual page 80

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
4. TROUBLE SHOOTING
No
No
No
No
No
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Refer to
Power On Trouble
Reconnect FPCB
Re-solder
Connector
Replace the FPCB
The LED is broken.
Change the LED.
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