HP Compaq Presario,Presario V4000 Hardware And Software Manual page 64

Most external monitors receive video information from the
notebook using the external VGA video standard. The
hotkey can also toggle images among other devices receiving
video information from the notebook.
The following video transmission types, with examples of devices
that use them, are supported by the
LCD (notebook display)
External VGA (most external monitors)
S-Video (televisions, camcorders, VCRs, and video capture
boards with S-Video-in jacks)
Composite video (televisions, camcorders, VCRs, and video
capture boards with composite video-in jacks)
Composite video can be connected to the notebook only when
it is connected to an optional docking device.
Initiate Standby (fn+f5)
The
fn+f5
When standby is initiated, your work is saved in random access
memory (RAM), the screen is cleared, and power is conserved.
When the notebook is in standby, the power/standby lights blink.
To initiate standby, the notebook must be on. If the notebook
is in hibernation, you must restore from hibernation before
you can initiate standby.
To resume from standby, briefly press the power/standby
button, use the TouchPad, press any key on the keyboard, or
press the music button, DVD button, or a TouchPad button.
To restore from hibernation, briefly press the power/standby
button.
Hardware and Software Guide
hotkey is set by default to initiate standby.
Keyboard and TouchPad
hotkey:
fn+f4
fn+f4
3–9