hi, just bought a new samsung hdtv (6 series) and want to hook up my laptop (dell) to it via hdmi. yesterday I hooked it up and there was no problems. when I tried to use it this morning, there was no sound, but a picture. I unhooked the hdmi from my computer and plugged it back in, and it was working fine. now a couple of hours later i tried to turn it on again and my tv is saying there is no signal. I unplugged the hdmi cable, plugged it back in, same thing - no signal. I tried a different hdmi cable (monster cable) and still no luck. it just says no signal.

any suggestions?
thanks