Question about JVC GM-P420UG 42 in. Plasma Television

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JVC GM-P420E Plasma no video green screen

Im having trouble getting any Video signal on input A input B and componant. RGB 1 has video signal from my Digital set top box but i cant connect my cabble tv to any othe input. I get a green screen on all three video input.

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  • Anonymous Apr 05, 2008

    Same problem. Green screen on A and B inputs. Can't use my DVD/VCR, but the cable box input is OK. Geek squad was worthless

  • Anonymous Mar 15, 2014

    trying to place cable box on hdmi 1 inputs v1 thru 5 will not pull hdmi 1

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The problem is with the micro processor on the back of the fx-1169a board (gm-p420ug) this is the board the inputs connect to . yours may be a diffrent p/n due to yours bein a "e" extention model. to repair this problem you need to remove the processor from the socket, remove the socket from the board and solder the processor onto the board. the processor is ic002 on the back side the problem is thermal in nature due to cold solder joints on the socket. i have fixed this problem many times by using this method.

Posted on Jan 28, 2009

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Hi don't have the solution for this issue but i'm experiencing exactly the same problem with my JVC GM-P420E : Green screen with all kind of input, the problem is intermittent, it appears more or less after 1/2 hour from switch on .It seems to be related to the thermal conditions ... any help or suggestion is welcome - ottavio

Posted on Sep 22, 2007

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This is card problem, you need to replace the card- FX 1170 A. Apparently I have been told that it's worth $1000. Please check. Harish

Posted on Oct 26, 2007

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Posted on Jan 02, 2017

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Hello

Your TV will display all High Definition signals as 1080i True HDTV™ and all standard definition signals will be displayed as 480p.

Component Inputs 1-2
YPbPr(480i/480p/1080i)
These inputs can be used for the connection of A/V equipment with component video outputs, such as a DVD player or external HDTV receiver. Please see Appendix B for signal compatibility.
Input DTV (480i/480p/1080i)
This input is used to connect an external DTV receiver, and can be configured for YPrPb and RGB plus H&V signal types.

As a special feature, you have the ability to adjust the red and blue light beams in reference to the fixed green light beam. This process is called convergence. There are two separate memories for convergence. One, for SD 480i/480p signals; the other for HD 1080i signals. SD convergence should be adjusted while watching an SD source and HD convergence should be adjusted while watching an HD source.

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InputDTV
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This input is compatible with some DTV receivers using RGB with "separate H and V sync". Compatible DTV signals are SDTV 480i, 480p, and HDTV 1080i. All other DTV signals, such as 720p, need to be converted by the DTV receiver to one of the compatible signal types. Industry standards for DTV RGB signals (systems, synchronization, timing, and signal strengths) are not currently established. These inputs will not be compatible with all DTV receivers that offer RGB, HV outputs. RGB, HV signals with less than 5 cables are not compatible.
If your DTV receiver offers both DTV component video signals and DTV RGB, HV signals, we suggest you use the DTV component video signals. Check the DTV receiver specifications before connecting.
Ok.

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I just got apple tv and don't know if I can hook it up to my gm-v42ug flatscreen tv Apple TV takes HDMI but the tv doesn't have an hdmi input that I can see. Can I hook it up? If so, how/ Thank you!


the tv has as follows. Use the bnc conectors to hook it to the RGB & R and L Audio. or reg Comp input ( Yellow ,Red White.) can get adaptors at the Shack. Inputs
Composite BNC Back Composite RCA Back Component 3 BNCs Back RGB 5 BNCs Back RGB 15-Pin Dsub Back RS232 DB-9 Dsub Back



Dec 25, 2010 | JVC GM-V42UG 42 in. Plasma EDTV

1 Answer

I plugged in the normal 3 Video inputs and it still doesn't work.


More info is needed, please. When you say 3 video inputs, what are you referring to? I believe the Sanyo has the HDMI, RGB/YPbPr component video, S-video component, RCA composite video and Coaxial connections, though I'm not sure how many of each. So lets start with the best quality to least.

HDMI: This is one cable that provides both audio & video and produces the best picture quality. It comes in different lengths and is a wide, flat connection. A must for 1080p resolution signals.

Component video, RGB or YPbPr analog component cables: 5 separate RCA cables, 3 of which are video that separate the video signal & 2 audio cables. The 3 video cables are generally red, green and blue (RGB) or marked individually with the letters Y, Pb/Cb & Pr/Cr . The audio cables are red & white. You may see these on the back of DVD players often. They will carry a signal up to 1080i but not 1080p.

S-video component: One cable for video, it is a round connection with several pins in it and will only plug in one way. You must use 2 RCA cables for audio with this cable, red & white again.

Composite video: 3 separate cables; Red, White & Yellow. Red & White are audio, left and right while yellow is video.

And finally there is coaxial which it the cable that is identical to the cable from the pole/ cable box or your dish. It is the poorest quality.

What can happen is you are using 3 standard RCA cables and have them plugged into the component input & they will not carry the signal, or one end in component input and the other end in the composite output or vice versa. Another is that you have the wrong input selected on the menu. Check all your cables and connections, plus the input you have selected on the TV itself.

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All (4) video inputs are bad


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GOOD LUCK.

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1 Answer

Green Picture


The problem sounds like one I had. If so, the cause is as follows.

The Daewoo ouputs synchronisation information on the green channel of the RGB outputs (which are pins in the SCART socket) The Panasonic TV automatically preferentially selects the RGB input in the SCART rather than the composite video signal in the SCART. The video circuits in the Panasonic should ignore the sync on the green channel but instead interpret the sync as green signal information which means the adjustment of the green channel is upset leading to a very green picture.

Possible solutions:
1. From the TV, manually select composite video input, not RGB. This may not be possible - I think the TV automatically goes for the RGB if it is present.
2. Disconnect the wire to pin 16 in the SCART socket. This is the signal from the VCR/DVD to indicate that RGB is available. Disconnecting it means the TV defaults to the composite video. This is what I did.
3. Connect the TV to the VCR/DVD using component or S-VHS leads only.

Jan 13, 2008 | Daewoo DV-6T955B DVD Player/VCR

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