Question about JVC PD-42WV74 42 in. Plasma EDTV

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Green light blinking and TV will not turn on

I've read a couple comments about unplugging everything for 10 secs and then holding menu and volume buttons for 40 secs then pushing power button. It didn't work. I'm not sure what to do? Any advice?

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  • JVC Master
  • 5,568 Answers

In many sets, this is an indication of a failed power supply voltage. There are at least two supplies in every set; one is active always so the set can receive commands from the remote and requires minimal power and rarely fails. The other is turned on when the set is to be used and this one, is the likely culprit.
The type of supply used in modern sets is called a 'switched mode' power supply that operates at higher (than audible) frequencies in the range of 50,000 cycles and up. The supply first makes DC voltage from the AC input of 100-220 volts, then chops it at the elevated frequency. This design is much more efficient than the older type of 'linear' supply but is more complicated and critical in the quality of parts used.
These modern supplies are fussy about the quality of certain components and most will eventually fail due to crappy electrolytic capacitors, a part used for filtering and in feedback paths and they, by nature, don't really like these higher frequencies; they tend to break down chemically and lose their value until finally not performing as capacitors any more. This causes the supply to fail at starting up and more rarely, to cease operating while in service and sometimes develop internal losses that cause it to heat up and burst or at least bleed chemicals either of which causes their final death.
There are capacitors that are more resistant to this kind of decay but cost 2-5 times as much as common types and with the severe price competition in consumer electronics, manufacturers save where they can and use parts that will at least survive the warranty period.
I suggest you contact the service center for your area and inquire about the cost of board repair or replacement. If the latter, keep the failed board since there are small shops (I was one before retirement) with the skills to repair these at a more reasonable cost.
Before opening the back of your set, pull the plug and allow to sit, preferably overnight. There are nasty voltages inside that you want to avoid. The main power supply is often on a separate board, will have larger-than-average parts on it, with cylindrical parts (mostly capacitors) and some larger squarish parts (chokes and transformers) and most likely a 'heat sink,' a finned aluminum structure with parts attached to it. Look for a tag with a part number on it and have this available when you start looking for service or new board.
These assemblies are nearly always only plugged into the rest of the set with clearly dissimilar plugs so incorrect connections are somewhat prevented.
If you are unsure of yourself, take several pictures of this area before disconnecting anything that you can then refer to if uncertain. Remember, many assemblers of most of these just recently came in from small farming villages in Asia so assembly is kept simple. Good luck-

Posted on Jul 16, 2010

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1 Answer

Tv truns on then turns off


if model indicated do the self check it has:

On front of set when green light for power goes out press and hold both the menu and input (source) buttons at the same time for at least 5 seconds and release both buttons.

Power light will then blink a two digit error code like 2 blinks, 2 blinks a pause and repeat it for a total of 5 times.

If set has been unplugged you must plug it back and try to get set to turn on--unplugging clears the errors.

Let me know what error you find and I will tell you what it means.

Apr 28, 2012 | Mitsubishi WS-65809 65" Rear Projection...

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I have a Mitsubishi WD-62525 HDTV that suddenly wont turn on. Just has a green blinking light when you hit the power button. Any ideas?


I found this on another website, most likely it is your power supply capacitors.
  1. Press the "reset" button and hold for 10 seconds .... Does TV turn on and blinking green light turn to solid green.

  2. Unplug the TV from it's power source for various times, ranging between 5 minutes and 24 hours..... Does blinking green light continue upon plugging in the TV.

  3. Disconnect ALL devices from the TV; DVD, Tuner, Cable Box, unplug the TV for various duration times .... Does blinking green light continues upon plugging in the TV.

  4. Press Power and Menu buttons simultaneously and hold depressed for 20 seconds .... Does blinking green light continue to flash.

  5. Press Power and Display buttons simultaneously and hold depressed for 20 seconds .... Does blinking green light continue to flash.

  6. Insure that no front panel buttons are inadvertently stuck in an "engaged" position.

Diagnosis: If none of the above test resolve the issue, then the failure lies in one of the following:

  1. DM Module Capacitors have FAILED.
  2. DM Module is defective.
  3. EEPROM Board failure
  4. Power Supply failure.

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JVC 42 inch LCD HD TV has no picture or sound


utencilio posted this fix. It worked for my JVC LT-42X579.

Okay, I found a fix! Called JVC, spoke to somebody there, here it is:
1)unplug the TV completely, no wall no power strips, completely
2)wait 10 sec
3)plug TV back in and Turn it on, the light will still be doing the same thing
4)wait 30 sec
5)ON THE TV, not the remote, locate the menu, volume (-) and power button.
6)while simultaneously holding down the menu and volume (-) button, pressed the power button ONCE and continue to hold the other 2 for 10 sec.
7)on the remote control, go to menu>settings>system info
*** now this I know as a FACT will work on systems that display: JVC - ver.5.32FO001, but I don't know of any other versions***
8)press the mute button on the remote twice
9)unplugg TV again and wait 10 sec.
10) plug TV in and turn on

It SHOULD be working normally now... Thanx to the guys a JVC support for this one, I know it seems like an obvious first place to look, but sometimes it isn't. I for one checked online forums first

Jan 28, 2009 | JVC LT-42X579 42 in. LCD TV

1 Answer

Blue light


Okay, I found a fix! Called JVC, spoke to somebody there, here it is:
1)unplug the TV completely, no wall no power strips, completely
2)wait 10 sec
3)plug TV back in and Turn it on, the light will still be doing the same thing
4)wait 30 sec
5)ON THE TV, not the remote, locate the menu, volume (-) and power button.
6)while simultaneously holding down the menu and volume (-) button, pressed the power button ONCE and continue to hold the other 2 for 10 sec.
7)on the remote control, go to menu>settings>system info
*** now this I know as a FACT will work on systems that display: JVC - ver.5.32FO001, but I don't know of any other versions***
8)press the mute button on the remote twice
9)unplugg TV again and wait 10 sec.
10) plug TV in and turn on

It SHOULD be working normally now... Thanx to the guys a JVC support for this one, I know it seems like an obvious first place to look, but sometimes it isn't. I for one checked online forums first.

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1 Answer

Panasonic TH42PZ70B


Flashing RED lights in Panasonic TVs means a fatal error code. Unplug the TV, wait 1 minute and replug. If the LED still flashes it needs professional service.

Sep 04, 2008 | Panasonic TH-42PA20U/P 42 in. Plasma EDTV

1 Answer

LC-32SB24U LCD HDTV... Brand new, just out of box. Turn on, goes to language menu for about 1 second max,too fast to adjust, then screen goes black and little green led power light starts to blink. And...


Good Day, texxastam;

Do this:

1. UNPLUG TV
2. HOLD IN VOLUME DOWN &INPUT buttons on TV
3. Plug in the TV. (the TV will turn itself on).
4. A blue "K" should now be showing on the TV screen, release the buttons.
5. Press and release the VOLUME DOWN & CHANNEL DOWN buttons simultaneously on the TV. (A blue service menu will appear on the screen).
6. Using the remote, press the DOWN SELECT button once. (The highlighted line should read INDUSTRY INT (+CAUSE) OFF
7. Using the remote, press VOLUME UP once (OFF changes to ON).
8. Press ENTER. After a few seconds the screen turns green and shows - Industry INIT success - at the top of the screen.
9. Unplug the AC cord for 10 seconds then plug back in.

Good Luck, big IRISH.

PS; I did not make this up... it's from SHARP> again good luck...you may have to do this several times....too...get the timming down.

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1 Answer

Green power light will not stop flashing and tv will not turn on or off


You need to replace the 1000uf capacitors on the DM board thats the classic symptom of the DM caps being bad the light continues to blink repeatedly. If you need more info on the repair let me know.

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1 Answer

Green light just blinks


Four bad 1000mf/25v caps in DM module = Common repair
for qualified Mits tech..................................T.

Nov 11, 2007 | Mitsubishi WS-48513 48" Rear Projection...

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