When using F4 on my Compaq Presario laptop, pictures of my computer screen and project shows, what am I doing wrong?

Watch out for Fn+F4 as that is the VGA external monitor mode.
my guess is this means.
"my monitor , computer, and projector shows."

you used 2 key words here, one is monitor. a laptop has no monitor, so you added one.
then said the word projector, well if you have that the the external monitor is removed and now is a External VGA projector
or own a dual port adaptor ,etc. (me blind cant see what you have there at all)


the FN+F4 key is a toggle.
like mine.
1: internal
2: extenral
3: both
4: auto.

did you read your manual yet, at HP, we are not HP we have no manuals here at fixya. not one.
but no model PC stated. at all just
Compaq Presario laptop CQnnn something, on the service tag?
the oldest book is CQ32-100 covering it.

page 30 covers thes
says push and hold Fn Key
then press F4
here it is a the real deal , HP
http://h10032.www1.hp.com/ctg/Manual/c02104736

If your "F" function keys are a second function of the keys they are on there will be a key, usally located in the area of the lower left corner of your keyboard. If the "F" functions are in color, so will the key that activates them. The idea is that you hold down the Fn key while striking the selected "F" key