Question about JVC LT-40X776 40 in. LCD HDTV

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JVC 40 inch LCD digital inputs (1 and 2) no longer works. Standard video and component cable inputs work, but not HDMI. Please help

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  • Anonymous Mar 15, 2014

    Tivo will not recognize on hdmi 1 input, HDMI 1 does not show on v 1 v2 v3 v4 v5 how do you get to the two hdmi 1 and hdmi 2?

  • Anonymous Mar 15, 2014

    The HDMI inputs are not working...

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This TV has a sensor that deactivates the inputs when light is sensed. perform this procedure to correct it:

1. press "Sleep" button on the remote
2. while "Sleep timer 0" is showing, simultanuously press "display" and "video" button on the remote
3. you should be in the Service menu of the TV....if not you should do the steps again
4. select "self check" from the displayed options.
5. when the "self check" menu is displayed, Power off the TV.
6. unplug and replug the TV.
7. Check the digital input.

if the input never worked for you, it is possible that you have the DVD/Bluray/whatever set up incorrectly. I don't think this TV accepts 1080P resolution so make sure it is set to 1080i or lower

Posted on Jun 23, 2009

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Ck the vcc on the hdmi smd ic

Posted on Oct 07, 2010

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I can't get audio to work on my Samsung UN40HU6950F UHD TV HDMI 1 input using the Time Warner Cable Cisco 4742HDC cable box.


if all 4 inputs work with another input source(i.e. your Motorola box) it indicates the issue is with the TWC input source. Also check your HDMI cable to be sure it is in good condition & properly plugged in on both ends.

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No optical output except when using ipod dock on tv


Unfortunately, there is a limitation on the JVC LT47P789 digital optical audio out. This audio output does not get the signal from any HDMI source. This is described on page 49 of the user manual. The manual is available from JVC here: http://resources.jvc.com/Resources/00/01/14/YA653ien.pdf . There is a similar restriction for the analog audio output from the TV with the HDMI inputs.

If you use the component audio/video inputs on the TV from your set-top cable box and DVD player, then the optical audio output will work. Otherwise, you need to find a way to connect the audio directly to the receiver. Some receivers have multiple HDMI input ports. These then forward the video signal on their HDMI output to the TV. Another option is to connect the analog audio outputs from the cable box and DVD player to the receiver. This may require resetting the Audio output from these set-top boxes to keep from sending the audio over the HDMI cable. With the Cinemate, you might need some sort of audio input switch or an HDMI converter and switch that separates the audio from the video signal.

I hope this helps. Please add a comment with more information about your devices for ideas on how to work-around the problem with this JVC TV.

Cindy Wells

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How to hook up xbox 360 to jvc dlp thru hdmi ports


You can use an HDMI-to-DVI cable for the TV's DVI input and this would give you video at full HD 1080p resolution but you need to route the audio via standard red & white RCA. It would be better if it has digital audio inputs such as optical or coaxial to get Dolby Digital and other digital formats from your source.

If in the unlikely scenario that it does not have a DVI input (which looks similar to your PC's blue VGA only wider and is white) you can hook it up to your component video-in (which is the red/blue/green RCA inputs). For this you need a cable that has HDMI on one end and red/blue/green for video RCA's +red/white RCA's audio.

This would give you 1080i resolution with stereo audio.

Hope that helps.

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1. This TV has setting for the HDMI input that allows you to select the HDMI Audio or Analog(red/white wire) audio. Make sure this is correct

2. Most cable boxes are DVI not HDMI. If DVI then you actually do need to use those Red/white cables. If HDMI, refer back to #1.

3. The cable box has a setting to select the Audio output, HDMI (digital) or Analog(red/white cables). Just like #1, this has to be set.

4. Contact your cable company to help you set up the box correctly. JVC can probably help you check the TV

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1 Answer

Can't connect XBOX 360 please help!


How many video ports does it have? You may have to search through video 1, 2, 3, or switch the TV itself to component/HDMI depending, with the remote. Should be with an 'input' button.

My tv has a list with HDMI, SVIDEO, COMPONENT, PC, ect. and its a 1080p one, im just assuming all HDTV's have a list

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1 Answer

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JVC may allow warranty exception or some accomodation for 15 days out. You have 2 seperate issues

1. White lines spreading is probably a video process problem. I think this TV has 3 Boards inside. Middle one is most likely suspect followed by the one on the Right

2. HDMI input not working is because they were turned OFF. JVC TV's have a sensor that will shut off the HDMI if the TV's back cover is removed. This must be reset in the Service Menu.

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1 Answer

No Digital Signal to TV


make sure you have Tv on that particular HDMI input .I believe video 6 or 7 .if you do check menu make sure that input is not blocked. or you might want to try the component outputs of cable box and connect that to a component input on tv to see if that is working,,i have seen these tv HDMI input board bad..lets hoe this is not the case..

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1 Answer

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You have a bad main board it sounds like.

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