Question about JVC LT42P789 42 in. LCD TV

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The screen shows ''Weak Signal'' and no picture, even though audio is coming through from both the Cable DVR box and Blue-Ray player. The cable box connects to the TV with an HMI cable - all five TV inputs show ''Weak Signal''.

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Mine did the same thing once. I think all I did was hit the setup on the remote, and let it run back through all the channels and then it worked just fine.

I hope this works for you.

Posted on Mar 21, 2009

  • Neville Jason
    Neville Jason Jan 15, 2014

    tried that but to no avail, But thanks. Any more ideas please

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My samsung 67 in flat screen has a double picture and I have no idea why. An example would be: it it says weak signal the display shows it like so "weak signal" "...


http://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB8QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dj7vl7-vZEL8&ei=1Dl0VKbHCobEmwWHyYL4DQ&usg=AFQjCNEAyKFYUTGQJSdIJHNNQNODhqatWQ&bvm=bv.80185997,d.dGY
That YouTube link may help as it deals with the double image problem on a Samsung LED TV. It should at least give you a clue about the nature of the problem. You might have to try Samsung's tech support otherwise. I don't think this is a matter of needing some 3rd party signal amplifier because I figure you are using cable TV if you paid a bundle for a set.

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This could be a reception problem of the cable transmission or the cable box if used. Are you using cable or SAT box. Tv goes to blue screen if signal is weak automatically.

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If the backlight is not turning on, you should be able to see the lcd image by shining a bright flashlight at the screen.

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Philips are legendary for having power supplies that fail due to bad capacitors, so that could be the culprit as well.

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1 Answer

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1 Answer

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