i have just bought an lcd screen and home cinema system and was told i could run my sky box through the home cinema with scart lead and then out of the home cinema box to the tv with hdmi which would up scale the picture quality is this possible because i cant get it to work i have the sound but no picture i can coonect via scart straight from the sky box to the tv but i would like to do it through the home cinema system please help this is wrecking my head