The Computer Screen Is Blank - HP Compaq NC6400 Getting Started

The computer screen is blank

If the computer is on but the screen is blank, the computer may be
in standby or hibernation, may not be set to display the image on
the computer screen, or the display switch may not be functioning
properly.
Try the suggestions below to resolve the issue:
To resume from standby or restore from hibernation,
■
briefly press the power button.
Standby and hibernation are energy-saving features that can
turn off the display. Standby and hibernation can be initiated
by the system while the computer is on but not in use, or
when the computer has reached a low-battery condition. To
change these and other power settings, select Start > Control
Panel > Performance and Maintenance > Power Options.
To transfer the image to the computer screen, press
■
On most models, when an optional external display device,
such as a monitor, is connected to the computer, the image
can be displayed on the computer screen or the external
display, or on both devices simultaneously. When you press
fn+f4
display, one or more external display devices, and
simultaneous displays on all devices.
Press the display switch on the computer to confirm that it
■
moves freely.
The display switch is normally located on the upper-left
corner of the keyboard.
Getting Started
repeatedly, the image alternates among the computer
Troubleshooting
.
fn+f4
3–3