LG LMXS28626 Series - Wi-Fi Modem Not Working Troubleshooting

Symptom Check Point
1. Wi-Fi modem
doesn’t work
1. Check connector
2. Display PCB
3. Wi-Fi modem PCB
8-20. Wi-Fi modem doesn’t work
Wi-Fi ON Voltage [V]
CON802
1
st
pin ~ 4
th
pin
5V
CON802
2
nd
pin ~ 4
th
pin
Not
0V, 5V
CON802
3
rd
pin ~ 4
th
pin
Not
0V, 5V
Display PCB
CON802
CON802
Wi-Fi PCB