Toshiba C855-S5133 사용자 설명서

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The keyboard you connected may be defective or incompatible with 
the computer. Try using a different make of keyboard.

Here are some typical display problems and their solutions:

Display Auto Off may have gone into effect. Press any key to 
activate the screen.

If you are using the built-in screen, make sure the display priority is 
not set for an external monitor. To do this, press 

F4

. If this does not 

correct the problem, press 

F4

 again to return the display priority to 

its previous setting.

HINT: Pressing the 

F4

 key several times will advance you through the 

display options.

If you are using an external monitor:

❖

Check that the monitor is turned on.

❖

Check that the monitor’s power cord/cable is firmly plugged 
into a working power 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 

F4

 to make sure the display priority is not set for the built-

in screen.

You can change the display settings by clicking a blank area of the 
desktop with the secondary control button, then clicking 
Personalize. This opens the Personalization window. Choose a 
theme for your desktop background, under Colors, Sounds, and 
Screen Saver, or change the settings for each of these components 
individually. Click Display and then Change display settings to 
choose the screen resolution.

For more information, see the Windows

®

 online Help.