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Black screen,blue power light is on. JVC LT-42P789

Turn it on and you get a blue power light but no picture or sound.

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  • Master
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You possibly have faulty main board

Posted on Dec 10, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: My JVC LT-47X579 is not "turning on" since we

hmm i had the same problem the saturday before on my lt-42x579but i didnt have anything hooked up to it blue light came on then flashed ..no pic this happend one week after it was pd off from a rental store we should investigate

Posted on Jan 03, 2011

freetek
  • 5568 Answers

SOURCE: JVC Mod #LT-42P789.

Bad news; the cost of the panel and labor will be close or equal to replacement cost for the whole set.
If you are lucky, you might find a used 'pull' at the site below:
Jimmy's Parts
Asian labor has made nearly everything 'disposable.'

Posted on Jan 29, 2011

  • 10 Answers

SOURCE: my 52 in jvc model lt-52x579 turns on but there is

Sound like the power supply board has gone out .Unplug the tv for 2 or 3 minutes and plug it in again and try to turn on. Some times they will come on .But It sounds like the PSB is going out .

Posted on Feb 14, 2011

  • 10 Answers

SOURCE: i have a jvc lt-26a6asj

hi, the most probably is broken one of neon lamps that illuminates led display .you can check that when you turn it on and flashes, see if one side of screen is brighter then other. also,it can be that power supply in led display got weakened and haven`t got enough power,but that is job for service like any bigger failure.
this is not the only answer,there is always several solutions but you have to give more informations about malfunctions. good luck!

Posted on Feb 27, 2011

budmrtn
  • 11361 Answers

SOURCE: JVC LT-37E488 no picture, clear sound. Turn it on

You will need to do in-depth troubleshooting, please read below:
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Posted on Apr 29, 2011

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Black screen in jvc lt 42e478


If you can see a dim image when you look at the screen at a sharp angle then you most likely have a faulty inverter board or faulty CCFL lamp/s.
Most likely faulty inverter board which supplies high voltage to the CCFL lamp/s.

Jan 16, 2012 | JVC LT-42E478 42 in. LCD Television

1 Answer

I have a jvc lt-26a6asj tv blue power light is on but no picture just black screen when turn on and off get a flash of picture but then goes to black screen


hi, the most probably is broken one of neon lamps that illuminates led display .you can check that when you turn it on and flashes, see if one side of screen is brighter then other. also,it can be that power supply in led display got weakened and haven`t got enough power,but that is job for service like any bigger failure.
this is not the only answer,there is always several solutions but you have to give more informations about malfunctions. good luck!

Feb 27, 2011 | JVC Televison & Video

1 Answer

My 52 in jvc model lt-52x579 turns on but there is no picture or sound and about two seconds later the led light for the power starts to blink i tried to turn it off but it just keeps on trying to turn on...


Sound like the power supply board has gone out .Unplug the tv for 2 or 3 minutes and plug it in again and try to turn on. Some times they will come on .But It sounds like the PSB is going out .

Feb 14, 2011 | JVC LT-52X579 52 in. LCD TV

1 Answer

JVC Mod #LT-42P789. Screen is damaged, need replacement screen.


Bad news; the cost of the panel and labor will be close or equal to replacement cost for the whole set.
If you are lucky, you might find a used 'pull' at the site below:
Jimmy's Parts
Asian labor has made nearly everything 'disposable.'

Jan 29, 2011 | JVC LT42P789 42 in. LCD TV

2 Answers

The tv doesn't power on, it trys to power up, but then goes off, the blue power on button to the left is blinking. Please help, thank you


If you go jvc .com enter your model # ,there is an article on how to reset the tv. First you have to unplug your tv for 10 secs., plug it back in and press and hold the menu and vol- buttons while holding these buttons in press the power button once, count to 3 and release the menu and vol- button. The lillte blue light should be on. wait for 40 secs. the picture should now come back on. This worked for me, I had the same trouble.
mike

Jan 12, 2010 | JVC LT42P789 42 in. LCD TV

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Turns off by itself


ther is technical error

Jul 11, 2009 | JVC LT-32P679 32 in. LCD TV

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JVC LT-32P679 Blinking Power Light, Automatic Shutoff


1. Hold [menu] and [vol-] button on the side of the TV
2. while holding these, press the [power] button on the side of TV (NOT remote)
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4. wait 10 seconds then let go of [menu] and [vol-]
5. wait another 30 seconds and some type of picture should appear

I think this is right. I got it from the JVC call centers guys so sorry if I missed or messed up a step.

Mar 17, 2009 | JVC LT-32P679 32 in. LCD TV

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