Problem Areas; Power; Will Not Power On Or Will Switch Off Randomly - Sony Xperia M Manual

1

Problem Areas

1.1

Power

1.1.1 Will not power on or will switch
off randomly
Check:
Inspect whether the phone vibrates after the on/off key is
pressed.
Action:
If activation of the vibrator is detected, refer to section 1.4
'Display'.
Check:
Inspect the contact pads on the battery.
Action:
1. If dirty or oxidized – clean the pads.
2. If damaged – replace the battery.
Check:
Inspect the battery contact pins.
Action:
1. If dirty or oxidized – clean the contact pins.
2. If adhesive is detected on the contact pins, use an eraser
to gently rub off the adhesive.
3. If damaged – replace Main PBA.
Check:
Inspect the on/off key (a) and the on/off switch (b).
Action:
Refer to section 1.2.4 'On/Off Key'.
1277-1356 Rev 2
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech) G (
4(45)