Fingerprint reader problems
• Problem: The surface of the reader is dirty, stained, or wet.
Solution: Gently clean the surface of the reader with a dry, soft, lint-free cloth.
• Problem: The reader often fails to enroll or authenticate your fingerprint.
Solution: If the surface of the reader is dirty, stained, or wet, gently clean the surface of the reader with a
dry, soft, lint-free cloth.
For tips on how to maintain the fingerprint reader, see “Using the fingerprint reader” on page 40.
Battery problems
• Problem: The battery cannot be fully charged in the standard charge time when the computer is powered
off.
Solution: The battery might be over-discharged. Do the following:
1. Turn off the computer.
2. Ensure that the over-discharged battery 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.
• Problem: The computer shuts down before the battery status icon shows that the battery is empty.
Solution: Discharge and recharge the battery.
• Problem: The computer operates after the battery status icon shows that the battery is empty.
Solution: Discharge and recharge the battery.
• Problem: The operating time for a fully charged battery is short.
Solution: Discharge and recharge the battery.
• Problem: The computer does not operate with a fully charged battery.
Solution: The surge protector in the battery might be active. Turn off the computer for one minute to reset
the protector; then turn on the computer again.
• Problem: The battery cannot get charged.
Solution: You cannot charge the battery when it is too hot. Turn off the computer and allow it to cool to
room temperature. After it cools, recharge the battery. If it still cannot be charged, call Lenovo Customer
Service to have it serviced.
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. The ac power indicator
also does not light up.
Solution: Do the following:
1. Ensure that the connection of the ac power adapter is correct. For instructions on how to connect the ac
power adapter, see “Using the ac power adapter” on page 20.
2. If the connection of the ac power adapter is correct, turn off the computer, and then disconnect the ac
power adapter.
3. Reconnect the ac power adapter, and then turn on the computer.
4. If the power adapter icon still is not displayed in the Windows notification area, have the ac power
adapter and your computer serviced.
Chapter 7. Troubleshooting computer problems 69
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