Sony Ericsson K790i User Manual page 79

I cannot turn on the phone
Possible cause: The battery is
discharged.
Solution: Recharge the battery
%
5 To charge the battery.
Solution: Turn the phone on with the
charger attached. If the phone starts,
restart the phone with no charger
attached.
I cannot charge the phone or battery
capacity is low
Possible cause: The charger is not
properly connected to the phone.
Solution: Make sure that the charger
connector clicks properly into place
%
when connected
battery.
Possible cause: The battery
connection is poor.
Solution: Remove the battery and
clean the connectors. You can use
one of the following lightly soaked
in alcohol; a soft brush, a cloth or
a cotton bud. Make sure that the
battery is completely dry before you
put it back. Check that the battery
connectors in the phone are not
damaged.
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5 To charge the
Possible cause: The battery is worn
out and needs to be replaced.
Solution: Try another battery and
charger for the same phone model,
or visit your retailer and ask them
to verify if the battery and charger
are working properly.
The phone turns itself off
Possible cause: The
been pushed unintentionally.
Solution: Turn on the automatic key
lock, or lock the keypad manually
%
77 Keypad Lock.
Possible cause: The battery
connection is poor.
Solution: Make sure the battery is
inserted correctly
card and battery.
I cannot use SMS/text messages on
my phone
Possible cause: Settings are missing
or incorrect.
Solution: Contact your service
provider to find out the correct SMS
service center setting
Messaging (SMS).
Troubleshooting
button has
%
5 To insert SIM
%
31 Text
79