I'm using a HDMI cable to connect a laptop to a TV. I've tried three different ports on my TV and the only port on my laptop. I have attempted to remove any dust from all the ports. I have also used Port 1 on my TV which has worked for other HDMI cables. I have cycled through the input channels to make sure the TV is on the right output. I have tried to change my laptop settings to detect the TV and connect to it, but it won't detect the TV. My laptop has no graphics card though, only the on-board graphics chip in the motherboard and I'm not sure if this makes a difference. I have no other way of testing the cable, otherwise I would have. The HDMI port on the laptop has never been used before. Any suggestions would be greatly appreciated.