Toshiba Portege 4005 User Guide - Page 201

is incorrect or the current settings don, problem with your display settings and that the adapter type

Page 201 highlights

201 If Something Goes Wrong Resolving a hardware conflict password, press the Enter key, type the password, and press Enter to return to work. If you are using the built-in screen, try changing the display priority to make sure it is not set for an external monitor. To do this, press Fn and F5 simultaneously. If you are using an external monitor:  Check that the monitor is turned on.  Check that the monitor's power cable is firmly plugged into a working electrical outlet.  Check that the cable connecting the external monitor to the computer is firmly attached.  Try adjusting the contrast and brightness controls on the external monitor.  Press Fn and F5 simultaneously to make sure that the display priority is not set for the built-in LCD screen. The built-in screen flickers. Some flickering is a normal result of the way the screen produces colors. To reduce the amount of flickering, try using fewer colors. The operating system displays a message that there is a problem with your display settings and that the adapter type is incorrect or the current settings don't work with your hardware. Reduce the size of the color palette to one that is supported by the computer's internal display. The display is set to a simultaneous display mode (LCD/CRT or LCD/TV) and the external display device doesn't work. Make sure the resolution of the external display device and the internal display match. For example, if the external device is only capable of displaying resolutions up to 800 x 600, you'll need to change the resolution of the internal display to 800 x 600.

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201
If Something Goes Wrong
Resolving a hardware conflict
password, press the
Enter
key, type the password, and press
Enter
to
return to work.
If you are using the built-in screen, try changing the display
priority to make sure it is not set for an external monitor. To do
this, press
Fn
and
F5
simultaneously.
If you are using an external monitor:
Check that the monitor is turned on.
Check that the monitor
s power cable is firmly plugged into a
working electrical outlet.
Check that the cable connecting the external monitor to the
computer is firmly attached.
Try adjusting the contrast and brightness controls on the
external monitor.
Press
Fn
and
F5
simultaneously to make sure that the display
priority is not set for the built-in LCD screen.
The built-in screen flickers.
Some flickering is a normal result of the way the screen produces
colors. To reduce the amount of flickering, try using fewer colors.
The operating system displays a message that there is a
problem with your display settings and that the adapter type
is incorrect or the current settings don
t work with your
hardware.
Reduce the size of the color palette to one that is supported by the
computer
s internal display.
The display is set to a simultaneous display mode (LCD/CRT
or LCD/TV) and the external display device doesn
t work.
Make sure the resolution of the external display device and the
internal display match. For example, if the external device is only
capable of displaying resolutions up to 800 x 600, you
ll need to
change the resolution of the internal display to 800 x 600.