Toshiba PPM78U05L01E User Manual

User’s Manual

8-21

PORTÉGÉ M780

Please also refer to Chapter 3, 

, and to the 

documentation supplied with your monitor for further information.

Monitor does not 
turn on 

After confirming that the monitor’s power switch 
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.

Press the FN + F5 hot key in order to change the 
display priority and ensure that it is not set for the 
internal display 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 they 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.