User Guide

Troubleshooting
131
Troubleshooting
Troubleshooting
Problem Possible causes and solutions
Cannot switch
the phone on
• Ensure that the battery is inserted correctly
(page 51).
• Ensure that the battery is charged (page 53).
Cannot charge
the battery
• Ensure that the battery is inserted correctly.
• Ensure that the AC charger connector is clean.
The battery
loses power
quickly
• Adjust the backlight timer so that the backlight
remains on for a shorter time.
No SIM or
Invalid SIM is
displayed
although there
is a SIM card in
the phone
• Gently clean the contact pad of the SIM card.