Lenovo ThinkPad Edge E145, User Manual

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Solution : The control is designed to compensate for minor differences in balance and does not
completely mute either channel.
• Problem : There is no volume control for MIDI sound in the Volume Mixer window.
Solution : Use the hardware volume control. This is because the built-in synthesizer software does
not support the control.
• Problem : The sound cannot be turned off completely even if you set the Volume Mixer at minimum.
Solution : You still can hear some sound even though you have set the Volume Mixer at minimum. To turn
off the sound completely, go to the Volume Mixer by clicking the speaker icon in the taskbar, then click
Mixer . Click the Mute speaker icon.
• 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. For details,
refer to the help information system for Realtek HD Audio.
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. 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 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.
Chapter 9
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Troubleshooting computer problems
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