Question about JVC LT Televison & Video

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MY JVC LT-40DG20J DOESN'T COME ON

Initialy it would turn on after 5 mins of the blue light flashing, it then wouldn't come on at all and no blue light , i then tried it after a few days and it worked wow, then after two days of leaving it on (frightend to switch it off ) it sitched it's self off and now i have no blinking blue light and no blanking tv. oh the touch buttons still beep. any idea's anyone.

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  • JVC Master
  • 8,617 Answers

That could be a main board issue or a power supply issue. I would check the power supply for the stand by voltages and see if any are missing or low

Posted on Nov 05, 2012

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Posted on Jan 02, 2017

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SOURCE: I have a JVC LT-42X579 TV. I got home tonight and

This is common problem of the failure of power supply board inside TV. You need technician to figure out this problem.

Posted on Aug 13, 2009

  • 1 Answer

SOURCE: JVC LCD TV LT-42X688-powers on, blank screen. no picture,no sound

Hi , I have the same problem with my LT-42X688,so i called the service of my extended warranty provider . the TV technician just left and told me the motherboard is the problem. he said its the third one this week he has seen with the same symptoms. he ordered the motherboard and i've got to wait 5 to 7 work days before the part will be in . I will keep you posted when the guy will return.

Posted on Jul 21, 2009

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I have a JVC 40 inch LCD lt-40dg20j TV. It was on working fine then just went off. There is no power lights even coming on. What can it be.??


If you have not checked the power outlet yet, start there. Many times a bad plug in or a triped electrical breaker will be all that is wrong. If you are sure that you are getting electrical power to the unit, then most likely you have a faulty power supply board in the unit.

Oct 18, 2014 | Televison & Video

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JVC LT-40DG20J 42` HD TV wont turn on. I turned my TV on and no picture just blue flashing light, after hours of turning it on an off it came on, after 5 6 hours it shut off again, now there's NO flashing...


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience. Do a search by type in the brand name of the device to the search box.

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Could be an open internal fuse or power supply failure

Mar 18, 2017 | Televison & Video

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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

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1 Answer

My tv won"t turn on.


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)
3. blue light comes ON and stays ON
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.

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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)
3. blue light comes ON and stays ON
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.

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