HP Compaq Presario,Presario 1800-XL1 User Manual page 115

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Tip
Symptom Problem
Screen is blank. Screen saver
is enabled.
Your Notebook is in
Sleep mode. This is
identified when the
Sleep
displayed.
The external monitor
display is selected.
Display is Brightness and
too faint. contrast controls are
not set properly.
Display only Your resolution
fills part of settings are not
the screen. set properly.
Characters are The external
garbled or the monitor's resolution is
display flashes set too high for
when your your Notebook.
Notebook is
connected to an
external monitor.
Video or Display
Solution
Press the Spacebar or click
with the TouchPad.
Press any key.
icon is
Press the Fn+F3 keys to
switch between the LCD
display, external monitor,
TV-Out (available on select
models), and simultaneous
display.
Press the Fn+F8 keys to turn
up the brightness. (On select
models, you can adjust the
contrast.)
1. On the taskbar, click the
Start button and point
to Settings.
2. Click Control Panel.
3. Double-click Display.
4. Click the Settings tab.
5. In the Screen area, click
the slider and drag it to
the desired resolution.
6. Click OK to accept the new
settings, then close the
Control Panel window.
Restart your Notebook and
reset the Display settings for
a lower resolution. Refer to
the solution for "Display only
fills part of the screen" for
more details.