I have a Dell tower with an Intel i7 CPU runnung W7 Ultimate 64-bit.
The graphics card is an AMD Radeon HD 6900 series.
My problem is when I go to calibrate the colour there is no red slider,
there is a slider it's just that it is black and doesn't adjust anything
while the blue and green sliders work fine, apparently the drivers are up to date.
Could someone let me know what the problem is and how I can remedy it.