PC Peripherals Connecting 2 hd-ready tv

Hey i just got a new 22" Sansui HD-Ready TV
when i connect it to the TV using HDMI cable im facing the following issues
1-Every thing until the main desktop gets displayed(Eg : start up screen,windows loading etc etc) ,after which it tells no input!!!
2-in safe mode everything works including main screen
3-When i connect the CPU directly 2 my 46" Sony using HDMI it works fine

why is this happening??? pls do help
 
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