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My JVC LT42X579 blue light stays on it won't turn off.

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  • george3077 Nov 30, 2008

    When i pull the power plug the light goes off but if i plug it back light comes on again and tv won't respond.

  • george3077 Dec 01, 2008

    I will try that, thak you..

  • Anonymous Mar 27, 2009

    I have the same problem.... The blue light (power light) is on but the tv gets totally locked up... wont turn on, off, nothing unless you unplug it and wait about 3 minutes.

  • asdfads1 Apr 21, 2009

    I got the same problem.
    JVC LCD TV sucks! Not recommend to buy.


  • jungo9691
    jungo9691 May 11, 2010

    When you pull the power plug?

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Go to set up
light effect and set up accordingly

Posted on Jan 30, 2011

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If what you mean is that the blue screen won't turn off (after about 5 minutes), so you should go the your tv menu options and select how much time in the blue screen option (under 'picture' or something like that).

Posted on Nov 30, 2008

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2 Answers

Wiring diagram and board lay out for jvc lt42x579 tv


Hi,

I have the copy of JVC LT-42X579 service manual that covers the following :

precaution
specific service instructions
disassembly
adjustment
troubleshooting
wiring diagram
block diagram
circuit diagrams
pattern diagrams
voltage charts
waveforms
using p.w. board & remote control unit
exploded view parts list
exploded views
printed wiring board parts list
remote control unit parts list (rm-c2050-1c)
packing
packing parts list


If you want the copy click it HERE.

Jdvillanueva

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

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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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4 Answers

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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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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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