Toshiba P750, P755, P750D, P755D Sound system, External monitor

Troubleshooting

Sound system

In addition to the information in this section, please also refer to the documentation supplied with your audio device.

Problem	Procedure
No sound is heard	Adjust the volume.
	To increase the volume click the volume up
	button, and to decrease it click the volume down
	button.
	Check the software volume settings.
	Please check to see if Mute is turned to Off
	Check to make sure the headphone connection
	is secure.
	Check within the Windows Device Manager
	application to ensure the sound device is
	enabled and that the device is properly working.
	For further information, please refer to
	"Troubleshooting in Windows" section of
	Windows Help and Support.
Annoying sound is	In this instance you may be experiencing
heard	feedback from either the internal microphone or
	an external microphone connected to the
	computer - please refer to Sound System in
	Chapter 4, Operating Basics for further
	information.
	Volume cannot be adjusted during Windows start
	up or shut down.
	If you are still unable to resolve the problem,
	contact your reseller, dealer or service provider.

External monitor

Please also refer to Chapter 3, Hardware, Utilities and Options, and to the documentation supplied with your monitor for further information.

Problem	Procedure
Monitor does not turn	After confirming that the monitor's power switch
on	is on, you should check the connections to make
	sure that the power cord/adaptor is firmly
	connected to the monitor and to a working power
	outlet.
No display	Try adjusting the contrast and brightness controls
	on the external monitor.

User’s Manual 8-20