I have a Dell Studio 1737 laptop with an HDMI port. I'm trying to connect it to a 42" Vizio HDTV (brand new). It's worked once, but that's it. Not again. I connect the HDMI cable to the TV and it just says "No Signal!"
System Configuration: Windows Vista Firefox 3.0.12
I had this same problem. Took me a while but I figured it out. Right click on desktop and select "Personalize". Next click on "Display". You should see "connect to a projector" on the left. Select it then select duplicate. Its that simple.