MBP-r using HDTV as primary display

Hi Guys
i am currently using MBP-r 15incher mid 2012
upgraded to mountain lion 10.8.3
and all the possible patches
i connect a Belkin HDMI cable from the MBP-r to the Samsung 32incher fullHDTV
the MBP-r detected the samsung display and the correct 1920x1080 resolution
but the TV said no signal.....
plug and unplug doesnt help,
what am i doing wrong here?
Kit

might the tv need to be set to a particular channel to see the signal like on the antique dvd's?
Is there a switch for analog mode? Turn that off.
Make certain the power cords are all pushed in as far as possible OK from samsung page:
LCD: How Do I Connect My Laptop To My Monitor?
Important: If you have a Sony Vaio laptop, click here to view our FAQ with important information regarding your laptop and Samsung monitors.
To connect your monitor to your laptop, follow these steps:
Turn off both the monitor and the laptop.
Using the appropriate cable, connect either:
The 15 pin D-sub out port on the laptop to the 15 pin D-sub in port on your monitor
The DVI out port on your laptop to the DVI in port on your monitor
The HDMI out port on your laptop to the HDMI in port on your monitor
Important: Connect only one of the signal cables.
Turn on your monitor and laptop.
Press the FN key (usually in the lower left side of the laptop keyboard) and, depending on your laptop, the F1-F12 function key. The monitor displays.
Note: The F1- F12 function key you should press often has the words LCD/CRT on it or a picture of a monitor. See sample image below of Function Key Location.
In addition, you may need to change the source on the monitor to get the monitor to display.
Notes:
The sequence and options below may vary depending upon your laptop.
On most laptops, each time you press the FN key and the appropriate function key, you cycle through the following sequence.
Monitor display off, laptop display on
Both monitor display and laptop display on same desktop image (Clone, Dual View)
Both monitor display and laptop display on with one long desktop image. (Extend, Extended Image)
Monitor display on, laptop display off. (Presentation, Projector Mode)

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MBP-r using HDTV as primary display

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