I cant get a picture when i connect my laptop to my tv through hdmi. my laptop is a medion e6221. the tv is a dmtech lm37xty. i tested the only hdmi socket on the tv using a hd sky box, works fine. the output hdmi on the laptop works fine on another tv. it just seems to be a incompatability with both laptop and tv. does anyone have a clue whats happening. tried 3 different cables. tried rebooting laptop and rebooting tv.