Question about JVC LT-42X688 46 in. LCD HDTV

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My JVC LCD flat screen tv has a picture, but no sound

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Let verify first to narrow down to where the problem can be. First, make sure the MUTE function is not activated, then check the on screen sound set up menu to make sure the speakers are not set to OFF. If the setting is OK, then attach the powered PC speakers to the Audio Line out RCA jacks (Red and White) to see if you can get the sound there, if you do, then the problem can be in the power amp circuits, if you do not get the sound at RCA jacks, then the problem can be in the sound processor circuit. Please post back what you find.
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http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
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Posted on Aug 06, 2010

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JVC tv sound but no picture


It could be a main board, but it could be a backlight problem. To verify this, turn on the set, dim the lights in the room, shine a bright flashlight on the screen. If you see a faint picture, you have a backlight problem.

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My jvc flat screen tv has no picture but with sound.


If this is LCD you possibly have a faulty inverter board or t-con board

Inverter board--if you have image/picture when you used flash light on screen that is the prblem..

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CAfter the JVC model LT-42E910 is on for 10 minutes, the picture goes blank/black, but I have sound. I must turn off the tv and turn it back on every 5 minutes to get a picture. The tv is 4 days old.


It is a new tv.Take it back where u bought it and trade it in for another tv.This tv have those 2 LCD long inverter boards have problems.These 2 long LCD inverter boards are to help the tv LCD screen panel to have a backlight for the tv LCD screen to produced a picture.

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My rca flat screen I can hear the sound but the picture is black. I think I fell asleep on the remote control but since I can't see the s teen is there anything I can do to get my picture back? This is a...


Now,the tv turn on screen panel have flashes pictures a few sec. than died and have sound left only?Yes.This problems ur tv is having,most likely the tv long LCD inverter board is dead.This long LCD inverter board job is to help the LCD screen panel to have a backlight to produced a picture.Can u do some basic machanical skills,like take things aparts and putting it back again?Yes,Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Long LCD inverter board for the replacement.

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There is a way to reset television. I have a jvc 42inch that was just going to main logo screen and not beyond it. If i remember correctly you unplug the tv hold power button for 5 sec on tv then let go plug in and start. If that dont work unplug and then plug and hold power button on tv for 5 sec. It is 1 of those combinations. My tv worked after that. I googled my problem and a website listed that some tvs need to be reset.

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1. Hold [menu] and [vol-] button on the side of the TV
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2 Answers

JVC LT 42x688 no picture just sound


Sorry, this has no easy fix. The good news is you do not need an LCD Panel. The bad news is the Video Processor has a problem.
This TV has x3 Boards. The one you should replace first is the one in the middle. If this doesn't fix it, try the one on the right. The Part #s are on the Boards if you wanna try ebay.

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