LG-ID3100
LGE
LG Electronics Inc.
Checking Flow : Back Light
START
Check the TP2 of U303,
+VPWR
Does U303 work Properly?
No
Yes
Check & replace QSC
Yes
No
Re-Soldering or
Replace U303
Check the signal level at
TP3(LCD_BACK_EN)=high?
Replace QSC
No
Yes
LCD backlight will
work properly
45/57
LGE Internal Use Only