Hi, I was playing a movie on my laptop and tried to play it through my samsung tv via a hdmi cable. I plugged the cable from lcd to laptop and everything worked on lcd great (video and sound). However while it was playing i stupidly unplugged the hdmi cable out while it was playing to untangle the lead and when i plugged it back in the video came on but no sound and a box came up saying i need seperate audio leads to play audio on lcd now, why is this??? it was working fine though before that??