
Troubleshooting Guide (mech)
1279-7185 Rev 1
Sony Mobile Communications AB – Company Internal
5(68)
1
Problem Areas
1.1 Power
1.1.1 Will not power on or will switch
off randomly
Check:
Check whether the phone vibrates by pressing the on/off
key.
Action:
1. If activation of the vibrator is detected, refer to section 1.4
‘Display’.
2. If NO activation of the Vibrator is detected, check that the
battery is charging when connected to a charger.
Follow 1279-7188 Test Instruction - mechanical chapter
2.3.7 (Charging via USB and Easy Charger), Diagnostic
Battery / Charging status.
Check:
Inspect the on/off key.
Action:
Refer to section 1.2.3 ‘On/Off Key’.
Check:
Inspect the BtB connector of the Battery to Main PBA.
Action:
1. If not properly connected – disconnect and reconnect it.
2. If dirty or oxidized – clean the both sides of the BtB
connector.