Dell Lightning User Manual page 95

Problem
You cannot enable
certain call features
PIN Code is blocked
System problems
Battery does not charge
Unable to turn the
phone on.
The phone turns off
automatically
Possible causes
Your service provider does
not support these features,
or you have not applied for
services that provide these
features.
You have entered an
incorrect PIN code three
consecutive times.
The battery or battery
charger is damaged.
The phone's temperature is
below 0°C or higher than
45°C.
Poor contact between the
battery and charger.
The battery is empty.
The back cover has come
off.
Battery contacts are not
clean.
The back cover has come
off.
Possible solutions
Contact your service
provider.
Contact your service
provider. If the service
provider provides the SIM
card's PUK code, use the
PUK code to unlock the SIM
card.
Contact the dealer.
Adjust the battery charging
environment to avoid
extreme temperatures.
Check all connectors to
ensure that all connections
have been properly made.
Charge the phone.
Ensure that the back cover
is firmly secured to the
phone.
Seek your dealer's help to
clean the contacts.
Ensure that the back cover
is firmly secured to the
phone.
Troubleshooting
95