LG -E400f Service Manual page 68

4.9.2 WLAN/BT/FM Block
LGE Internal Use Only
Set the phone GPS is ON
Check TP1 About .7V?
Yes
Check TP About .6V?
Yes
Change the board
No
Check power LRC filter soldering
No
Check SW and NV item
3
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4. TROUBLE SHOOTING
1
3
2
Only for training and service purposes