I have been connecting a portable DVD player to an old tv using a cable with black and yellow in DVD player and white yellow red in the other. The TVs doesn't have these inputs so am using an adapter to scare. However something has happened so that video is now black and white?? Tried a different adapter but not fixed. The colour works fine on TVs so assume it's the scart? The TVs has a hdmi so what adapter do I need for white yellow red into hdmi?