i bought this from amazon; http://www.amazon.com/gp/product/B0025V2VO0/ref=oss_product and i connected it just the right way. my tv says no signal. what is wrong? it doesn't get it. Macbook pro says nothing bt screen turns blue for an instant when i disconnect it. i click detect displays and nothing happens. please help. adittional info; mbp is 15" 2010 i5 2.4 ghz tv is samsung led tv bought in september 2009.