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LG-MC2670
Checking Flow
Is the voltage level VBATT
(R446, R442)3.2-4.2V?
Are all LEDs LED400~409
Q400, R410 is working?
Check the signal level at
KEY_BACK_EN=high?
BACKLIGHT WILL
WORK PROPERLY
START
No
Yes
No
working?
Yes
No
Yes
No
Yes
42
Charge or Change Battery and try again
Check the soldering of each R or
replace LEDs not working
Check the condition of Q400, R410.
If problem, Change Q400, R410.
Replace MSM
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