Could you post the DX Diag reports for both the systems with this issue?
Does the issue occur when you connect to a LCD type display or only on the projector?
Also, what model of DLP Projector are you using and how do you connect to it?
Have you tried adjusting the Display and Color settings in the Intel HD Graphics Control Panel?
Where do I find the DX Diag reports?
These are all laptops so there is an LCD screen on them... but I don't use them. I only connect to a Benq W1070 DLP projector. The AMD based lappy (3 years old) output a perfect Full RGB signal and I think what is happening is the Intel HD4400 (3 day old laptop) is clipping the Whites / WTW and maybe Blacks / BTB ... the Whites are so hosed it is like staring at the sun, on screen.
I have tried using both RGB & YCbCr ... YCbCr is worse but RGB is still unwatchable in many scenes.
Also, I'm running the latest drivers.. updated today from the default drivers that came with the laptop... no difference.
Please tell me there is a fix and this high-end laptop is not a waste.