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hdmi laptop to tv no picture no sound

Last response: in Windows 7
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February 26, 2014 1:30:31 AM

HI, okay well I have a hp laptop computer and a Panasonic tv and I have been trying to connect them together with a hdmi cord, but it does not work, there is no picture or sound. the display came on once for a second and then went off with a few black lines running over the screen, as if the cord was beening pulled out. I thought the cord may have been faulty so I brought a new one but still nothing. can someone help me please???
a friend said that the problem could be in the computer settings?????
February 26, 2014 1:32:44 AM

Make sure your TV's native resolution matches the resolution of your laptop.

Thats why there's probably no picture or sound.

You won't get a signal if it's not compatible.
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February 26, 2014 2:07:54 AM

I just checked it, but still nothing?
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February 26, 2014 3:26:02 AM

That's strange.

When you connect your laptop to TV , does the laptop show any picture?

What windows are you using? And what laptop? What's your TV model?
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