About an hour ago I was watching Curb from my computer on the tv, having my laptop connected by a HDMI cable. Then I wanted to watch something on my PS3, so I took the cord out of the laptop and back into the PS3. It said there was 'no signal' but it still said there was something connected to that HDMI channel, but the screen remained blank. So I put the cord back in the laptop to see if that worked, and same result. There was no signal. Does this sound like I've damaged the cord? There is no visual damage that I can see.