Use of Powerpoint with NEC LT220 projector

[Guest]

When I use clipart through powerpoint with projector above I find the yellow
colour (seen on the computer screen) comes out as green (on the projected
screen) and no amount of changing the colour brings it back to yellow.
However using the projector with, for instance, a DVD the yellow colour is
the same on the computer screen and the projector screen. Can anyone explain
this to me and are there any easy fixes which are cheap? I did find a gizmo
on the internet which claims it would give me true colours but it was
probabaly more expensive than the projector!

Thanks for your help.
Peter S

 

[Steve Rindsberg]

When I use clipart through powerpoint with projector above I find the yellow
colour (seen on the computer screen) comes out as green (on the projected
screen) and no amount of changing the colour brings it back to yellow.
However using the projector with, for instance, a DVD the yellow colour is
the same on the computer screen and the projector screen. Can anyone explain
this to me and are there any easy fixes which are cheap? I did find a gizmo
on the internet which claims it would give me true colours but it was
probabaly more expensive than the projector!

Try a couple of things as a test:

Draw a simple rectangle and change its color until it's a visual match, on your
PC screen, for the color that goes wonko on the projector.

Does this rectangle's color go wonko in the same way as the clip art does?

Try ungrouping the clip art to see if that changes anything.

Select the original clip art, press Ctrl+C to copy it, then choose Edit, Paste
Special, as EMF (and then repeat but choose as PNG)

Any difference in any of those when projected?

Are you using a color profile applied to the projector but not the monitor? Or
to both, which wouldn't be appropriate since they're different devices. It's
possible that Windows uses the profile when dealing with still images but not
with content from media player/dvds and such (too much processing overhead,
perhaps)

 

[Bill Dilworth]

A few things to look into. Yellow looking green suggests the red channel is
weak/missing. To demonstrate this to yourself, go to the Color picker in
PowerPoint and select the yellow color, then click on custom and reduce the
red channel by 50%.

1) Check the color out from the laptop. Hook it up to a regular monitor and
see if the color is off on the second screen, if it is, then the problem is
with the laptop video out.
a) check for color management software on the 2nd video output
b) check for a broken connector

2) Try a different cable between the projector and the laptop (even if you
need to temporarily plug in a short one), if the color is fine
a) check for broken connectors on the cable
b) check for broken wires (ring the cable)

3) If the color is fine in both the above cases,
a) see if there is a color input adjustment for the vga card on the
projector (maybe service tech assessable only)
b) insert a line booster with independently controllable color channels
and adjust for the loss (you may need to change to component video inputs)

Post back if these basics don't get you a solution.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..

 

[Steve Rindsberg]

Good stuff. That brings up another question for you, Peter.
When you mentioned that everything looks ok when you play a DVD, I
ass[cough,cough]umed that you meant "from the PC".

If you meant that the projector does a good job when fed from a DVD player, not
the PC ... very different story. In that case, ignore my suggestions until
you've tried Bill's, 'kay?