Pc to Tv HDMI Asus GTS 450 help!

So I bought a new tv (Samsung UE40ES5500) and I'm trying to hook it up to my pc (win7 x64). I have an Asus GTS 450 and I have connected them with an HDMI cable. My pc recognizes the TV, however, the TV keeps saying 'no input signal'.
I also have an onboard HDMI output and when I connect my tv to that one it works flawlessly (so I guess it's neither the TV nor a broken cable right?) but I also want to game on my tv so that's a no go.
I have also tried disabling the onboard HDMI output in the BIOS but still nothing on the GTS450. I have the latest nvidia drivers installed. Please help!
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  1. I haven't had a chance to look up the TV you have, but basically TVs tend to have three resolutions: 640x480, 1280x720, and 1920x1080. Try and go outside of those three resolutions, you tend to get the sort of issue you describe.

    So assuming you have the TV set up as a second monitor, make sure the resolution is set to one of the three I mentioned.
  2. I double checked, it's set to 1080p which is the correct resolution. I should also mention that I can also connect my laptop to the tv without problems.
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