Toshiba PRO L450 manual No display, On the external monitor, Internal display panel only, Again

	Troubleshooting
Problem	Procedure
No display	Try adjusting the contrast and brightness controls
	on the external monitor.
	Press the FN + F5 hot key in order to change the
	display priority and ensure that it is not set for the
	internal display panel only.
	Check to see if the external monitor is connected.
	When the external monitor is set as the primary
	display device in extended desktop mode, it will
	not display when the computer wakes up from
	Sleep Mode if the external monitor has been
	disconnected while in Sleep Mode.
	To keep this from happening, do not disconnect
	the external monitor while the computer is in
	Sleep or Hibernation Mode.
	Remember to turn off the computer before
	disconnecting the external monitor.
	When the display panel and an external monitor
	are set to clone mode and the monitors are
	turned off by the timer, the display panel or the
	external monitor may not display when turned on
	again.
	If this occurs, press FN + F5 to re-set the display
	panel and external monitor to clone mode.
Display error occurs	Check that the cable connecting the external
	monitor to the computer is firmly attached.
	If you are still unable to resolve the problem,
	contact your reseller, dealer or service provider.

This information is applicable to the models equipped with a built-in modem.

Problem	Procedure
Communication	Make sure the computer's internal modem
software can’t initialize	settings are correct - please refer to the Phone
modem	and Modem Options link within the Windows
	Control Panel.

You can hear a dial tone but can’t make a call

If the call is going through a Private Branch Exchange (PBX), take care to ensure that the communication application's tone dial detection feature is disabled.

User’s Manual 9-18