jaymo Posted on May 23, 2017

My vizio VW42LD TV has sound but no picture.

Have sound but no picture. I have narrowed it down to the main board or inverter. Keep reading that I may have to replace the backlight "inverters". After taking the back of my tv off i only see three visible boards - the main board, the power supply and an inverter board to the right. I dont see or find dual inverter boards as I have read about. Is the "one" inverter board i see the actual back light inverter itself? If not, where do i find these backlight inverter boards? Thanks

5 Related Answers

olayoju victor

191 Answers
Posted on Nov 10, 2008

SOURCE: VIZIO LCD 26 INCH model# VW26L HDTV10F NOT TURNING ON

unplug ur backlight inverter plug &power on to see ,if it doesnt on , change ur mainboard

marionbagget

718 Answers
Posted on Mar 07, 2009

SOURCE: Vizio L37hdtv10a fails to fully turn on

You will have to isolate the main board and Inverters.
Unplug the inverters and turn on the set.
If it "turns on" then try re-connecting each inverter seperately to see if only one is causing the problem.

Anonymous

1077 Answers
Posted on Jun 10, 2009

SOURCE: need inverter board for vizio L32 model an idea on

You can get a replacement inverter board at this link below:
http://www.shopjimmy.com/catalogsearch/result/?q=vizio+L32+inverter

Just make sure you match up the part number on the board.

Anonymous

308 Answers
Posted on Apr 03, 2010

SOURCE: Bad backlight inverter on 42" RCA LCD

Does the backllght go out after a few seconds? Could still be a lamp or something else on the inverter boards. You could try used inverter boards from the same set with other problems (broken screen), Or a complete working backlight from another set but very delicate operation to swap the LCD display from one panel to another.

Chi Chu

8457 Answers
Posted on May 01, 2010

SOURCE: How difficult is it to replace backlight inverter on a LCD TV?

Replacing LCD inverter board is very easy.Does not involved in any soldering.It a long board in shape.Just take ur tv aparts,use a Philip screw driver take out 6 Philip screws each board and connections.Do the reverse to install the LCD inverter boards.Tries Websites like Shopjimmy.com,Ebay.com to buy refurbish LCD inverter boards.

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I have a vizio 47 in tv that the picture went out on it have sound but no picture I replaced the tcon board and still no picture the tv is vo47L fhdtv10a

Sounds like Back - light problem. Check and replace damaged component/s at its back-light inverter board, or 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. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board...

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turn on the set, grab a bright flash light and dim the lights in the room. Shine the flash light on the screen, if you see a faint picture on the screen, you are dealing with a backlight problem. There are several things that can cause this. One, a bad backlight inverter, two, faulty 24vdc power supply, three, bad main board, or a bad faulty backlamp.

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If this is an LCD tv the backlight inverter is bad, a good way to check it is to shine a flashlight close to the screen and see if you can see a faint picture.
Let me know what you find

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

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Feb 18, 2012 • Televison & Video

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When the Vizio is turned on you see the screen for 2 seconds and then it goes black. The sound remains on.

It can be the 24vdc power supply problem (bad caps, ect.), or the backlights inverter problem, or the inverter is not getting the BL_ON signal from the main board, or worst case will be bad lamp assemblies. As you can see, there are many places to check to narrow down the cause of the problem, please read my guide first if you are going to DITY repair.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

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Aug 25, 2011 • Vizio VMM26 Monitor

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its the main board...

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It can be the main board, power supply, backlight inverter, etc.
You need to do some troubleshooting to narrow down the probelm, so please read my guide first.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c rating such as PANASONIC FM or FC series.
Please post back what you find.

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Nov 25, 2010 • Vizio GV42L 42 in. LCD Television

4helpful

2answers

No picture or sound can it be fixed and what is the problem and what parts do i need to fix it and will it be less than 300.00

It can be the power supply, main board, backlight inverter board.
First thing to do is to look at the power supply for any sign of bad caps with leaking/bulging tops, second will be the DC output voltages. We need to narrow down the problem first.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

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I have no picture, just a black screen on my insignia LCD36 TV I hear the sound, what is the problem?

The tv 2 or 1 the long board call the LCD inverter board are dead.The LCD inverter board help the LCD screen panel get a backlight to produuced a picture.Tries websites like Shopjimmy.com,Ebay.com to the refurbishes long LCD inverter board or boards for the replacememt

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Jun 29, 2010 • Insignia 37" LCD Flat-Panel HDTV

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No picture at all. had no problems until last night, turned TV on, and no picture. TV is VIZIO 32 inch LCD

Do you still get sound? If you do get sound, then the problem can be in the backlight inverter board or in the main power supply that supply 24vdc to the inverter board.

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VW42LF 42 in. LCD HDTV

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I have a vizio 47 in tv that the picture went out on it have sound but no picture I replaced the tcon board and still no picture the tv is vo47L fhdtv10a

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