LG -E455 Service Manual page 59

4.1.2.4 Checking RF signal path (FEM)
Check TP1(L169) at FL102
Check if there is any major difference referring
To Figure 4.1.1(b) Is any signal detected at
All WCDMA_B8 Rx check is complete.
If the phone sill do not work ,replace main board
LGE Internal Use Only
START
that point?
Yes
Is any signal detected at
that point?
Yes
No
Check L115, L169, L116, L111, L114, L112
No
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4. TROUBLE SHOOTING
Replace FL102
Only for training and service purposes