Lenovo ThinkPad T450, User Manual

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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 69.
Battery and power problems
This topic contains instructions on troubleshooting battery and power problems.
Battery problems
• Problem : The built-in battery cannot be fully charged in the standard charge time when the computer is
powered off.
Solution : The built-in battery might be over-discharged. Do the following:
1. Turn off the computer.
2. 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 built-in battery.
If the built-in battery cannot be fully charged in 24 hours, call Lenovo Customer Service Center to have
it serviced.
• Problem : Your computer shuts down before the battery-status icon shows empty, or your computer
operates after the battery-status icon shows empty.
Solution : Discharge and recharge the built-in battery.
• Problem : The operating time for a fully charged built-in battery is short.
Solution : Discharge and recharge the built-in battery. If your battery operating time is still short, call
Lenovo Customer Service Center to have it serviced.
• Problem : The computer does not operate with a fully charged built-in battery.
Solution : The surge protector in the built-in battery might be active. Turn off the computer for one minute
to reset the protector; then turn on the computer again.
• Problem : The built-in battery cannot be 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 Center to 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. Also the ac power
indicator does not light up.
Solution : Do the following:
1. Make sure 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.
3. Reconnect the ac power adapter, then turn on the computer.
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User Guide