20 Most Recent JVC LT42E478 42 in. HDTV Questions & Answers

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Need pedestal stand

6_4_2014_1_40_45_am.jpgIf you go on line and do a search " flat screen pedestal stands , you find many of them. The one pictured here is from the amazon site. If you want a table top stand, do the search for " table top flat screen stands" They are universal, so you just need to purchase one for a 42".
6/4/2014 1:46:31 AM • JVC LT42E478 42... • Answered on Jun 04, 2014
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NEED A 42 INCH JVC

Here is a link to a website that sells the original stand that came with the TV. : )

http://www.retechtv.com/products/jvc-lt-42e488-tabletop-base-pedestal-stand
7/26/2011 9:40:00 PM • JVC LT42E478 42... • Answered on Jul 26, 2011
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I own a LT 42E488

This tv problems are 90% to 95% is it a dying power supply board.Power LED light indicator blinks or tv take a really long time to come on.The tv problems indication are the power supply board have dying capacitors parts,it usally or alway bulges up or puffing up onto it tops and leaking,not giving the tv power supply voltages correctly anymore to the rest of the tv other boards.The tv power supply board,that the board,where the power a/c cord plug into it.The tv shop,will charges u like 600-700 bucks,they'll repair the board or they'll put in another refurbish power supply board for the tv.U have some basic mechanical skills like take things aparts and putting it back together again?Yes,tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board to do the replacement ur self.The cost of power supply board like $100-150 bucks plus shipping the part to u.The take out and the reinstallation of the power supply board it pretty easy and straight forward,if u willing to take a chance and putting in some labors.
4/26/2011 4:16:38 AM • JVC LT42E478 42... • Answered on Apr 26, 2011
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Jvc flat screen

Hello, The screen is blank with no raster at all. There are indications that the channel numbers are changing in the display. This indicates that some of the low voltages are present but these may be derived from the standby supply.
Assuming there is no deflection and no HV, you either have a low voltage power supply problem, bad startup circuit, or bad horizontal output transistor (HOT) or other bad parts in the horizontal deflection.
Check for bad fuses.
(If you have HV as indicated by static electricity on the front of the screen and you hear the high pitched whine of the horizontal deflection when it is turned on, then the following does not apply).
Use an ohmmeter to test the HOT for shorts. If it is bad, look for open fusable resistors or other fuses you did not catch.
Assuming it is good, measure the voltage on the collector-emitter of the HOT (this is safe if there is no deflection). You should see the B+ - probably between 100 and 150 V.
If there is no voltage, you have a low voltage power supply problem and/or you have not found all the bad/open parts.
If there is voltage and no deflection (no high pitched whine and no HV), you probably have a startup problem - all TVs need some kind of circuit to kick start the horizontal deflection until the auxiliary power outputs of the flyback are available.Others power the horizontal osc. IC from a special line-derived voltage. The multivibrator type are sometimes designed to fail if someone keeps turning the set on and off (like kids playing) since the power rating is inadequate.
Test the transistors if it is that type with an ohmmeter. If one is shorted, you have a problem. The usual way a TV service person would test for startup problems is to inject a signal to the base of the HOT of about 15.75 kHz. If the TV then starts and runs once this signal is removed, the diagnosis is confirmed. This is risky - you can blow things up if not careful (including yourself). This require a skilled personnel to handle this
If you hear the high pitched whine of the deflection and/or feel some static on the scree, confirm that the horizontal deflection and high voltage are working by adjusting the SCREEN control (probably on the flyback). If you can get a raster then your problem is probably in the video or chroma circuits, not the deflection or high voltage.
4/23/2011 10:39:22 PM • JVC LT42E478 42... • Answered on Apr 23, 2011
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THE CABLE CONNECTIONS ON THE

No.Tried telephone cable services like ATT U verse or Verizon Fios.Their boxes can used RCA AV component cable YRW cable connections to YRW component cable connection holes with both of these companies boxes to watches tv.
1/9/2011 6:28:31 AM • JVC LT42E478 42... • Answered on Jan 09, 2011
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The image dosent turn on

Check the middle Board on the TV. Look at the little 8 pin ICs for signs of damge (I expect it to be obvious). If you find damage, you got the problem...just get a board to replace the bad one.

If the middle Board is not the problem, I would guess the problem is with the board attached to the upper back of the LCD panel. You need to remove everything from the LCD panel to get to this. You will need to replace this board.
5/27/2009 8:35:46 PM • JVC LT42E478 42... • Answered on May 27, 2009
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My JVC 58in. Flat screen blinks?

The cable connections for your TV are not connected properly or are loose or the cables might have damage or the connection ports are broken.
12/6/2022 5:26:37 PM • JVC LT Televison... • Answered on Dec 06, 2022
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The USB will not work for pausing live TV how can I fix this?

no info generic answer read owners manual or search online for one
5/14/2022 12:50:19 PM • JVC LT Televison... • Answered on May 14, 2022
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JVC TV model,s avk14t3-1 has sound and no picture in audio-video mode

it needs service, that means using tools and meters and spare parts to find cause. dead screen black screened at all times.? even in HD TV antenna mode for HD TV? or just the remote CLICKER batteries dead. tell things that work and no not work , even LED actions. the maker has no books on this old TV https://jvcproducts.com/us/contact/support.html here they are ask them>? what rare TV. good luck fixing any RARE TV. moved you to TELEVISION.
3/24/2022 11:25:05 AM • JVC LT Televison... • Answered on Mar 24, 2022
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TV is just over one month old - screen started getting darker and darker in pathes, now more than 60%, tried resetting all settings to default, tried all inputs (Video, HDMI, RF) all the same result -

Return it to your place of purchase and get something else anything else you wouldn't believe how many people are having Issues with the LT series get rid of it.
1/4/2018 12:22:16 PM • JVC LT Televison... • Answered on Jan 04, 2018
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NO POWER LIGHT OR STANDBY LIGHT COMING ON

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://electro-medical.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)
3/10/2016 7:13:11 PM • JVC LT Televison... • Answered on Mar 10, 2016
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