LG GX200 - SIM1 SIM 2 LED Trouble

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4.5 SIM1 SIM 2 LED Trouble
4.5.1 Test Point
4.5.2 Circuit Diagram
Voltage PART
SIM1 LED1308.1 1.75V~2.0V TP1(LED1308.1)
SIM2 LED1307.1 1.75V~2.0V TP2(LED1307.1)
SIM1 R1403.1 2.8V TP3(R1402.2)
SIM2 R1404.1 2.8V TP4(R1405.2)
TP1
TP2
TP1
TP2
TP3
TP2
TP3
TP4