LG KS660 - Page 79

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4. TROUBLE SHOOTING
START
Pin3 of
Q700(KEY_BACKLIGHT)
i
s
l
o
w?
Assemble
OK
No
Check all of LEDs solder
Replace KEY FPCB
Yes
Yes
Check Pin2 of
Q700(KEY_PWM_EN)

Replace main board
No
Replace Q700
18pin connector
(CN702) is good?

Yes
Replace CN702
No