Laptop/CDU display

Hi all wizards
Trying to use my IBM Thinkpad for the CDU
Display configured for 2 screens active OK
When I plug a second monitor all is OK, 2 monitors active and going
When I plug the CDU to what looks like a TV out/SVideo plug at the back of the laptop I get
no image on the CDU screen, (CDU is active and the keys work if I open the CDU soft on the laptop screen.)
So I guess USB communication is OK but I cant have the display signal go to the CDU or in other words activate the TVout/s video plug.
(The cdu works perfectly on the other computers)

XP on all computers

Anything I'm missing.

Hi, are you trying to use all three at the same time?
On mine I can only use the VGA out OR the S-video out but not both at the same time.

Andy

No, I just checked with a second monitor that the vid card was OK.
I am back with the default monitor and my S/vid that I cant activate.
just two!!

I Found this on the Net and I did not try it yet but I am posting it in case someone needs the info.
http://www.haverford.edu/audiovisual...ptopchart.html