The Computer Screen Is Blank - HP Compaq NC4400 Getting Started Manual

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 slide the power switch toward the front of the
computer.
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
simultaneously displays on all devices.
■
If the computer has an ambient light sensor (select models
only), make sure that the sensor is not obstructed.
The ambient light sensor is located on the upper-right of the
display panel.
Getting Started
repeatedly, the image alternates among the computer
Troubleshooting
.
fn+f4
3–3