External monitor problems
•Problem: The external monitor is blank.
Solution: To solve the problem, do the following:
1.Connect the external monitor to another computer to make sure that it works.
2.Reconnect the external monitor to your computer.
3.Refer to the manual shipped with the external monitor to check the resolutions and refresh rates that are supported.
–If the external monitor supports the same resolution as the computer display or a higher resolution, view output on the external monitor or on both the external monitor and the computer display.
–If the external monitor supports a lower resolution than the computer display, view output on the external monitor only. (If you view output on both the computer display and the external monitor, the external monitor screen will be blank or distorted.)
•Problem: Wrong characters are displayed on the screen.
Solution: Did you follow the correct procedure when installing the operating system or program? If you did, have the external monitor serviced.
•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: 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. 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
•Problem: The sound cannot be turned off completely even if you 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.
Chapter 5. Troubleshooting computer problems 47
