Sony XPERIA ST27i Troubleshooting Manual page 13

Problem Areas: Illumination
Check:
Inspect the BtB connector of the Display FPC to the Main
PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean both sides of the BtB
connector.
Check:
Inspect the Cover Front Housing Display Assy.
Action:
1. If the Cover Front Housing Display Assy or its BtB
connector is damaged – replace the Cover Front Housing
Display Assy.
2. Replace board.
1265-6294 Rev 4
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Troubleshooting Guide (mech)
13(59)