Lenovo ThinkPad L450, User Manual

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Solution : If you use the Extend desktop function, disable it, and change the display output location. If
a DVD movie or a video clip is playing, stop the playback, close the program, and then change the
display output location.
• Problem : The screen position on the external monitor is incorrect when that monitor is set for a high
resolution.
Solution : Sometimes, when you use a high resolution such as 1600x1200, the image is shifted to left or
right on the screen. To correct this, first make sure that your external monitor supports the display mode
(the resolution and the refresh rate) that you have set. If it does not, set a display mode that the 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
details, see the documentation that comes with the monitor.
Audio problems
• Problem : Wave or MIDI sound does not play correctly.
Solution : Make sure that the built-in audio device is configured correctly.
1. Open Control Panel .
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. Make sure that the following device is enabled and configured correctly:
– Conexant CX20672 SmartAudio HD
• 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 .
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 details about controlling volume, refer to your Windows online help.
• 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 applications are used. The
applications 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.
Chapter 8
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Troubleshooting computer problems
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