Fingerprint Reader Problems; Battery And Power Problems - Lenovo ThinkPad T550 User Manual

Solution: You still can hear some sound even though you have set the Master volume control at minimum.
To turn off the sound completely, go to the Master volume control and select Mute speakers.
• Problem: When you connect headphones to your computer while playing sound, a speaker does not
produce sound.
Solution: Once the headphones are attached, the streaming is automatically redirected to it. If you want
to listen to sound from the speakers again, be sure to set those speakers as the default device. For
details, refer to the help information system for Realtek HD Audio Manager.

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, refer to Maintaining the fingerprint reader.

Battery and power problems

This topic contains instructions on troubleshooting battery and power problems.
Battery problems
• Problem: The removable battery cannot be fully charged in the standard charge time when the computer
is powered off.
Solution: The removable battery might be over-discharged. Do the following:
1. Turn off the computer.
2. Make sure 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 removable battery cannot be fully charged in 24 hours, use a new battery pack.
• Problem: The computer shuts down before the battery status icon shows that the battery is empty, or the
computer operates after the battery status icon shows that the battery is 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.
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User Guide