Keys; Menu, Home And Back Keys; Volume Key; On/Off Key - Sony Xperia tipo ST21i Troubleshooting Manual

Problem Areas
1.2

Keys

1.2.1 Menu, Home and Back Keys

Check:
Inspect the touch area of the menu key, home key and back
key on the Front Assy.
Action
Refer to section 1.3 'Touch Screen'.

1.2.2 Volume Key

Check:
Inspect the volume key (a) on the Battery Cover and the
volume switches (b) on the PBA.
Action:
1. If the volume key (a) or the volume switches (b) is dirty or
clogged – clean them.
2. If the volume key (a) is damaged – replace the Battery
Cover.
3. Replace PBA.

1.2.3 On/Off key

Check:
Inspect the on/off key (a) on the Battery Cover and the on/off
switch (b) on the PBA.
Action:
1. If the on/off key (a) or the on/off switch (b) is dirty or
clogged – clean them.
1266-1682 Rev 4
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Troubleshooting Guide (mech)
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