Mini DVi to VGA colour issues

Hi,

I recently purchased a projector to connect to my macbook. My intension was to use a mini-dvi to vga cable to do this, however when i connected everything up the projected image had a green tint. I must also state that i have connected a TV to the same port with a mini-dvi to s-video adaptor with no problems with the colour.

My first thought was that the cable was the problem, so i borrowed my friends macbook to see if they had the same problem. There where no issues, so if figured it was either a software or hardware issue.

My next step was to boot off the start up disk and plug the projector in, same issue - green tint.

So i have concluded that it is a hardware issue. I know that the mini-dvi port is connected directly to the logic board, if i want to get this fixed will i have to replace the whole logic board or is there another way.

All your help comes much appreciated.

Thanks in advance

Bob