Battery And Power Problems - ThinkPad S440 User Manual

Battery and power problems

This topic contains instructions on troubleshooting battery and power problems.
Battery problems
• Problem: The battery pack cannot be fully charged in the standard charge time when the computer is
powered off.
Solution: The battery pack might be over-discharged. Do the following:
1. Turn off the computer.
2. Ensure that the over-discharged battery pack is in the computer.
3. Connect the ac power adapter to the computer and let it charge.
If a quick charger is available, use it to charge the over-discharged battery pack.
If the battery pack cannot be fully charged in 24 hours, use a new battery pack.
• Problem: Your computer shuts down before the battery-status indicator shows empty, or your computer
operates after the battery-status indicator shows empty.
Solution: Discharge and recharge the battery pack.
• Problem: The operating time for a fully charged battery pack is short.
Solution: Discharge and recharge the battery pack. If your battery operating time is still short, use a
new battery pack.
• Problem: The computer does not operate with a fully charged battery pack.
Solution: The surge protector in the battery pack might be active. Turn off the computer for one minute to
reset the protector; then turn on the computer again.
• Problem: The battery pack cannot be charged.
Solution: You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the
computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it
still cannot be charged, have it serviced.
An ac power adapter problem
Problem: The ac power adapter is connected to the computer and the working electrical outlet, but the
power adapter (power plug) icon is not displayed in the Windows notification area.
Solution: Do the following:
1. Ensure that the connection of the ac power adapter is correct. For instructions on connecting the ac
power adapter, see Safety, Warranty, and Setup Guide that comes with your computer.
2. If the connection of the ac power adapter is correct, turn off the computer, then disconnect the ac power
adapter and remove the main battery.
3. Reinstall the battery and reconnect the ac power adapter, then turn on the computer.
4. If the power adapter icon still is not displayed in the Windows notification area and the system status
indicator does not blink three times when an ac power source is connected, have the ac power adapter
and your computer serviced.
Note: To display the power adapter (power plug) icon, click Show hidden icons on the Windows notification
area.
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Chapter 10 Troubleshooting computer problems
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