connecting projector to PC problem

[shadym]

Hi guys I have a Benq MP610 Projector its a good projector I guess I
bought it to be used in a computer lab in a school for demonstration
purposes my problem is I want the monitor of the computer which the
projector is connected to work with the projector because they are
using this computer for lessons which doesn't need projector also and
here is what I've tried so far:

- connecting an AGP VGA card to the computer (Didn't work)
Reason: my computer have a built-in VGA card and a free AGP slot when
the AGP card is connected the internal VGA will be disconnect
automatically from bios with no control over this feature to turn it
off.

- connecting the projector with computer and using the VGA out port
from the projector to the computer screen (Didn't work)
Reason: to use the out port on the projector I bought a female/female
cable to connect my monitor to the out port of the projector its making
my monitor showing curly moving lines passing horizontally across the
screen "maybe bad quality cables or something", and most importantly
when I turn off the projector the computer monitor will be turned off
as well which make the computer of no use to the other lessons with no
projector.

I am using windows XP Pro., my screen refresh rate is set to 60Hz the
VGA to Projector cable length is 5m and the female/female cable to the
monitor length is 3m.

What I am thinking about now is to buy a "monitor switch" if it exist I
don't know!! to out put from the computer to the monitor and the
projector and switch between them. Any comments will be greatly
appreciated, thanks for your time.

 

[Guest]

what I use is a video distribution amplifier see link:

http://www.kramerelectronics.com/indexes/item.asp?desc=204

it outputs two balanced signals from the box, one goes to the projector one
goes to the monitor

it is better than a switch as you can have both the projector and the
monitor displaying the image or just one of them

Gary

 

[Master Ninja]

what I use is a video distribution amplifier see link:

http://www.kramerelectronics.com/indexes/item.asp?desc=204

it outputs two balanced signals from the box, one goes to the projector one
goes to the monitor

it is better than a switch as you can have both the projector and the
monitor displaying the image or just one of them

Gary

I agree with Gary. It sounds like you just need a "VGA video splitter"
to split the signal from the computer into the monitor and projector.
You just need 2-port output with a signal amplifier. These are common
devices that you can find in most computer stores. The ones at CompUSA
start at $54:

http://tinyurl.com/p2ehl