Lenovo ThinkPad T470, Руководство пользователя

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monitor supports. If it does support the display mode you have set, go to the setup menu for the monitor
itself and adjust the settings there. Usually the external monitor has buttons for access to the setup menu.
For more information, see the documentation that comes with the monitor.
Audio problems
• Problem : Wave or MIDI sound does not play properly.
Solution : Ensure that the built-in audio device is configured correctly.
1. Go to Control Panel, and ensure that you view Control Panel by Category.
2. Click Hardware and Sound .
3. Click Device Manager . If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
4. Double-click Sound, video and game controllers .
5. Ensure that the device following Sound, video and game controllers is enabled and configured
correctly.
• Problem : Recordings made by using the microphone input are not loud enough.
Solution : Ensure that the Microphone Boost function is turned on and set by doing the following:
1. Go to Control Panel, and ensure that you view Control Panel by Category.
2. Click Hardware and Sound .
3. Click Sound .
4. Click the Recording tab in the Sound window.
5. Select Microphone (for Windows 7) or select Microphone Array (for Windows 10), and click
Properties .
6. Click the Levels tab, and adjust the Microphone Boost slider as you need.
7. Click OK .
Note: For more information about controlling volume, see your Windows online help.
• Problem : I cannot move the volume slider or balance slider.
Solution : The slider might be grayed out. This means that its position is fixed by the hardware and cannot
be changed.
• Problem : The volume sliders do not stay in place when some audio programs are used.
Solution : It is normal for the sliders to change position when certain sound programs are used. The
programs are aware of the settings in the Volume Mixer window and are enabled to change the settings
themselves. An example is the Windows Media Player program. Usually the program has sliders available
to control the sound from within the program.
• 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 : 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 even if I set the Master volume control at minimum.
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 Speaker/HP .
• Problem : When I connect headphones to my computer while playing sound, a speaker does not produce
sound.
Chapter 7
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Troubleshooting computer problems
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