Audio Problems; Battery And Power Problems; Battery Problems - Lenovo ThinkPad 13 User Manual

Solution: Press and hold the power button or power key for about eight seconds to turn off your
computer; then turn it on again.
• Problem: Missing, discolored, or bright dots appear on the screen every time you turn on your computer.
Solution: This is an intrinsic characteristic of the TFT technology. Your computer display contains
multiple thin-film transistors (TFTs). A small number of missing, discolored, or bright dots on the screen
might exist all the time.
• Problem: My screen goes blank while the computer is on.
Solution: Your screen saver or power management might have been enabled. Do either of the following:
– Touch the touch pad, or press a key to exit the screen saver.
– Press the power button or power key to resume from sleep.

Audio problems

• Problem: A volume or balance slider cannot be moved.
Solution: The slider might be grayed out. This means that its position is fixed by the hardware and
cannot be changed.
• Problem: The balance slider cannot completely mute one channel.
Solution: The control is designed to compensate for minor differences in balance and does not
completely mute either channel.
• Problem: When you connect a headphone to your computer while playing sound, a speaker does not
produce sound.
Solution: Once the headphone is 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.

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 battery might be over-discharged. Do the following:
1. Turn off the computer.
2. Connect the Lenovo USB-C 45W AC Adapter to the computer and let it charge.
If the built-in battery cannot be fully charged in 24 hours, have it serviced.
• 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 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, have
your computer serviced.
• Problem: The computer does not operate with a fully charged built-in battery.
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Chapter 4 Troubleshooting computer problems
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