20 Most Recent JVC LT-42X579 42 in. LCD TV Questions & Answers

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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
7/8/2019 4:54:15 AM • JVC LT-42X579 42... • Answered on Jul 08, 2019
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Access service menu on jvc LT-42P300

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
6/12/2019 12:49:53 PM • JVC LT-42X579 42... • Answered on Jun 12, 2019
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Jvc lt-42pm30

Horizontal lines are usually caused by a bad LCD (screen)..
9/24/2017 7:28:45 PM • JVC LT-42X579 42... • Answered on Sep 24, 2017
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My JVC LT47X579 47 in. LCD TV does not come on or any sound of operating is heard? what might be the problem?

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
9/30/2015 6:18:03 AM • JVC LT-42X579 42... • Answered on Sep 30, 2015
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Need to reset tv

There are two types of reset to TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done. Do a hard reset, and check.
9/3/2015 8:31:30 AM • JVC LT-42X579 42... • Answered on Sep 03, 2015
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JVC LT-42X579 blinking blue light

good thinking on your part
7/6/2015 3:33:20 PM • JVC LT-42X579 42... • Answered on Jul 06, 2015
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SCREEN LOCK WITHOUT A REMOTE

Without a remote control, you can't unlock it. If you wish to buy its original remote control, contact the authorized service centre, or authorized dealer to your device brand. They can either give you a genuine remote control to your device, or can direct you, from where can you purchase a suitable one. To select a proper universal remote control, you should know about the number of digits to its set-up codes. There are 3 digit, 4 digit, 5 digit, 2 digit and even single digit codes, to some brand devices. After confirming this, check the sites linked here. Both the sites have set-up code list and set-up procedure to many popular brand remote controls. Check which brand remote control has set-up code/s to your device brand, and buy that one according to availability. Brand name of the remote control isn't a matter, but it should have set-up codes in its code list, to the device brand you have. Please note: Every new universal remote control will have set-up code list, and set-up procedure along with its pack. Never accept a remote control, that hasn't both of this. For more details about the set-up codes, visit the site http://electrohelponline.blogspot.com/ Check this site too. http://remotesearch.blogspot.com/ Universal remote controls are available at most of the electronic spare part selling shops. Type in the brand name of your device, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.
1/27/2015 1:51:50 PM • JVC LT-42X579 42... • Answered on Jan 27, 2015
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When I turned on my JVC TV the picture came in well but there was n What do I do nowo sound. I checked to make sure the mute was off and I rescamed the TV

Check the speaker/s first. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
10/16/2014 12:35:41 PM • JVC LT-42X579 42... • Answered on Oct 16, 2014
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JVC TV LT-42X579 LCD TV 42 in.Does this TV have a Lithium battery for maintaining memory, similar to PC computers?

No. It has no such battery inside. Its memory IC is non-volatile type, and need no back-up electric charge to retain the data, even after it is switched OFF. http://electronicshelponline.blogspot.com/
9/18/2014 8:50:17 AM • JVC LT-42X579 42... • Answered on Sep 18, 2014
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What are the eeprom codes for jvc tv lt-42x579, eeprom m16

The number of the memory IC will be printed on it. Usually, it will be in laser printing. When replace it, be sure to replace with exact number printed on it; otherwise, it won't work. 8c1fb888-8c37-43a0-b2bc-0b5855a61739.jpg 51fc84b9-5fc8-433a-8615-3c3aae88cbaa.jpg Will look somewhat like this. May be a DIL type or an SMD type. http://electronicshelponline.blogspot.com/
9/16/2014 6:48:28 AM • JVC LT-42X579 42... • Answered on Sep 16, 2014
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Wmjttj

go to roku.com and wartch the video.lol.
8/16/2014 12:41:17 AM • JVC LT-42X579 42... • Answered on Aug 16, 2014
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1answer

Red lines still on jvc 48" rear projection tv

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Line, faults & possible causes to LCD screen are given with illustrations.
8/14/2014 5:37:16 PM • JVC LT-42X579 42... • Answered on Aug 14, 2014
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My jvc model lt22EM72 won't turn on...red button on front lights up when I plug it in however

hi hello there yes I think I can help you out here, the same thing went wrong with my fathers TV. and it turns out that its the capacitors in the circuit board of the TV. now then you need to open up the back of the TV, its really quite easy. all you do it when the back is off the TV look at the tops of the capacitors the good one that work will look and feel as flat as a pancake, the ones that are broken and nee replaced have a either slight bulge or have burst wide open you cant miss them they stick out like a sore thumb most of them. you need to heat up a soldering iron and carefully heat up the bottom of the capacitor so that the silver on the back of the circuit board melt and then pull out the capacitor. go to maplins and get a replacement for the ones that are broken. and replace them the very same way you took out the broken ones. do a good job on soldering them back in exactly and I mean exactly the same way they came out. make a note even draw it down the way they were before you take them out. that will fix your tv good luck
7/10/2014 10:18:57 AM • JVC LT-42X579 42... • Answered on Jul 10, 2014
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How can I get my JVC LT-42x579 TV to pick up digital channels?

A converter box is necessary to pick up digital signals. Gopakumar Gopalan Google
4/28/2014 5:45:42 PM • JVC LT-42X579 42... • Answered on Apr 28, 2014
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Philco Home Theatre dss-555 no sound

Sounds like main board fault. Contact any service technician. Gopakumar Gopalan Google
4/28/2014 3:47:09 AM • JVC LT-42X579 42... • Answered on Apr 28, 2014
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Jvc lt 42tg30j

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 stage 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, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/ Blinking codes details to many popular brand TVs are given. Surf the site with patience.
3/26/2014 6:12:52 PM • JVC LT-42X579 42... • Answered on Mar 26, 2014
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