LG GX200 - LCD Backlight Trouble

-70-
4.7 LCD Backlight Trouble
4.7.1 Test Point
Voltage PART
LCM_BL_EN/SET 2.8V TP1(R907.6)
LCM_LED+ 3.5V~4.5V TP2(U901.2)
LCM_LED1
LCM_LED1
LCM_LED1
0.7V~1.0V TP3(U901.1)
TP4(U901.10)
TP5(U901.9))
TP2
TP1
TP3
TP4
TP5