You will need to change the Video settings on your laptop as follow:
I stuck with exactly the same problem..
However my desktop has clear colors, my tv only displays a black/white scheme..
Is there anybody who knows why this happens? And how to prevent it..
This could be caused by having an incorrect format for the TV.
You could go to Display Properties -> Advanced ->Displays. Then Click on the Button TV-> Format Tab. Select the Format supported by your TV. Or select it based on your country.