Lenovo ThinkPad T570 User Manual page 113

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, and click the Properties button.
6. Click the Levels tab, and move the Microphone Boost slider upwards.
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 speakers.
• Problem: When I connect headphones to my computer while playing sound, a speaker does not
produce sound.
Solution: When the headphones are attached, the streaming is automatically redirected to it. If you want
to listen to sound from the speakers again, ensure that you set those speakers as the default device. For
more information, see the help information system for Realtek HD Audio Manager.
• Problem: Sound does not come from a headphone or a speaker, or the computer cannot record sounds.
Solution: To switch from one device to another (for example, from a speaker to a headphone, or from
an external microphone to a built-in microphone), do the following:
1. Go to Control Panel, and ensure that you view Control Panel by Category.
2. Click Hardware and Sound.
3. Click the Realtek HD Audio Manager icon.
4. Ensure that the computer is in MULTI-STREAM mode in the Device advanced settings window.
5. In the Volume Mixer window, select the device you want, for example, speakers.
.
Chapter 7 Troubleshooting computer problems
97