LG LG-D855 - Screen and Performance Issues

3. TROUBLE SHOOTING
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START
No
No
No
No
No
OK?
Check next step
Check TP1 Signal exist?
Check TP2 Signal exist?
Check TP3 Signal exist?
Check TP4 Signal exist?
Check TP5 Signal exist?
Check Transceiver physical damage
or soldering condition
Check FL1755 Soldering
Check FL1757 Soldering
Check F1760 Soldering
Check FL1758 Soldering
Check FL1102 Soldering
Replace U1500
Yes
Yes
Yes
Yes
Yes
Not good