LG E900 Service Manual page 82

Set the phone Rx is ON
Check TP1 Signal exist?
Check TP2 Signal exist?
Check TP Signal exist?
Check TP4 Signal exist?
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Check BIAS over 2.1V
Yes
Yes
Yes
Yes
Yes
Change the board
No
Check bias block soldering
No
Check RF Switch (M/S)
No
Check TX Module Refer 1.4
No
Check Duplexer
No
Check RTR6285 and Rx SAW filter
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4. TROUBLE SHOOTING
LGE Internal Use Only