Computer HDMI to TV connection problem

i have a problem with my hdmi cable...or not...for a year now everything was ok...the connection between tv and my pc was working perfect....and now for some reason when i connect my laptop(packard bell limited edition) with the tv(LG) the tv recognize that something has connect with the HDIM and the pc too but when i put it,it doesnt transfer image.i have sound but it says that it hasnt signal....what can i do????the cable i think its ok cause when i put it to ps3 everything its good.what can i do to know if the problem is on my HDMI port?????please help me.Hello,
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More about computer hdmi connection problem
  1. Do you have your PC "connected to projector"? Usually, you have to go into control panel and connect to the external device. What edition of Windows are you running?
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