Lenovo 2355AK4, T430SI manual Click the Realtek HD Audio Manager icon

•Problem: Recordings made using the microphone input are not loud enough.

Solution: Make sure that the Microphone Boost function is turned on and set by doing the following:

1.Open Control Panel and click Hardware and Sound.

2.Click Sound.

3.Click the Recording tab in the Sound window.

4.Select Microphone, and click the Properties button.

5.Click the Levels tab, and move the Microphone Boost slider upwards.

6.Click OK.

Note: For details about controlling volume, refer to your Windows online help.

•Problem: Sound does not come from a headphone or a speaker, or your 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.Open Control Panel and click Hardware and Sound.

2.Click the Realtek HD Audio Manager icon.

3.Make sure that you are in MULTI-STREAM mode in the Device advanced settings window.

4.In the Volume Mixer window, select the device you want-for example, speakers.

5.Play any sound via a music program (for example, Windows Media Player). Make sure that sound comes from speakers now.

6.Then, if you would like to switch to a headphone, close the music program.

7.Go to the Volume Mixer window. Then select another device, which is now the headphone.

8.Play any sound via the music program. Make sure that sound comes from a headphone attached directly to the system.

For more information, refer to the help information system of Realtek HD Audio Manager.

Note: In the Volume Mixer window of Realtek HD Audio Manager, a check mark by the entry for a device, such as speakers for a playback device, or a built-in microphone for a recording device, shows that the device has been selected.

•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 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 allowed to change the settings themselves. An example is the Windows Media Player. 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: The sound cannot be turned off completely even if you set the volume at minimum.

Solution: You still can hear some sound even though you have set the Volume Mixer control at minimum. To turn off the sound completely, press the speaker mute button.

•Problem: When you connect a headphone to your computer while playing sound, a speaker does not produce sound.

148User Guide