Question about JVC LT42P789 42 in. LCD TV

1 Answer

Hello My plasma display monitor (JVC- GD-4210PZW-G) made a popping sound - and went dead - Prior to this the picture started deteriorating and I had the upper and lower lights on the diagnostic lamps were flashing while the middle stayed on - I thought I had read something about somewhere - anyhow I need a diagnosis - is it the power supply. I keep hearing about the power supply - I m just wondering what else I should replace - none of the diagrams look like my tv 's "innards" thanks randy

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • JVC Master
  • 11,800 Answers

Yes, you got a major failure in the power source. Since it's related to the high tension for the panel and you heard a popping sound (most surely a capacitor going out in a big way) you should check all components on it - starting with the capacitors (replace them all to be sure) and the power transistor. Don't forget to check the main transformer and the board under it, it may be burned.

Posted on Aug 04, 2010

  • topobox Aug 04, 2010

    thankyou for your prompt response - can I assume the power supply is ok since I have sound which I forgot to mention ? thanks

  • Azrael SRL Aug 05, 2010

      No, the power source isn't fully OK, the flashing indicates that the power source is in protected mode - which means that it has shutdown itself  to protect itself from an short. 
      If the failing capacitor isn't on the power board and the protection acted instantly as it should then, yes, the source is intact - replace the failed capacitor and all other part it has damaged when it failed and the source, as the entire tv, will return to normal.

      If the protection system was slow or, even worse, the capacitor is on the source's board then the source has surely suffered a failed output line, the others still work, sort of. Now if the tv isn't run until all failed parts are replaced, a good repair guy has a look and also replaces the weakened parts (mainly the capacitors and diodes on the other output lines) then the source is easily (and cheaply) repairable.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Vizio P50HDTV10A TV went pop now has a black picture

Don't know which boards Z or Y have dead capacitors pop open,take ur tv aparts check boards that have pop opens parts or burn marks on them.Replaced that board will solved ur problems.Tries, to buy refurbish boards for the replacement.

Mar 22, 2010 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

Picture went out on p50hdm Vizio Plazma tv after loud POP

It's either the backlight lamp or backlight inverter is busted due to a power failure or fluctuation. Here's how to determine which is which:
  1. Grab a flashlight.
  2. Turn on the TV.
  3. Shine the flashlight onto the screen.
  4. If you cannot see any display even a faint one, the backlight inverter is dead, else the backlight lamps are busted.
  5. Replace which ever is the culprit.

Sep 26, 2009 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

I heard a loud pop and the display went out completely. i can still here sound but the picture just isnt there

It sounds like your monitor just went bad. The reason you can still hear sound is because there is nothing wrong with your sound card. You can try connecting the monitor to another computer to see if it works. If it does not, then the monitor has died.

Aug 17, 2009 | ESA PDP4294LV1 42 in. EDTV-Ready Plasma TV

1 Answer

GD-V425PZW Going in Standby Mode after few seconds. doesn't cm bk

Hi, basically it needs to be receiving a signal for it to operate.
eg. with my one i connect my decoder into it and once the decoder is on the tv turns on. good thing with this monitor is that i just need to turn the decoder off and the screen turns off shortly after. hope this helps.

Jun 30, 2009 | JVC GD-V425PZW Television

1 Answer

JVC GD-V425PZW no Picture

motherboard needs replaced, to test take a flashlight TV on and shine on screen from above at an angle, do you see a faint image, replace MB

Oct 30, 2017 | JVC GD-V425PZW Television

1 Answer

I heard a loud pop sound and my 48 zenith plasma tv picture went black. Even the words "video 1" don't show up when selected. It's getting power; The green/red light is on. I've checked all the...

Does anything come on the screen? Input display box? 
If no:
Sounds like it could be a blow capacitor. Cheap part, but need someone with a little electronic know how repair to fix it.

Mar 14, 2008 | Zenith P42W22B/H 42 in. Plasma Television

1 Answer

Jvc gd-421pce stuckinstandby

Hi there, did you ever solve your problem as i have the same problem?

Oct 08, 2007 | JVC GD-V4211PCE 42 in. Plasma Television

Not finding what you are looking for?
JVC LT42P789 42 in. LCD TV Logo

Related Topics:

21 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75767 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a JVC Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides