Problem Areas; Power; Will Not Power On Or Will Switch Off Randomly - Sony Xperia TX LT29i Working Instructions

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 Key
On/Off.
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 board.
Check:
Inspect the Key On/Off (a) and the key on/off switch (b).
Action:
1. If dirty – clean them.
1266-5087 Rev 1

Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
4(57)