Question about Vizio XVT3D474SV 47 in. 3D LCD TV

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I changed the main board and still I get a black screen. Could it be the t con board

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Posted on Jan 02, 2017

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claudeinmo
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SOURCE: Why are there vertical colored lines all over screen?

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Posted on Dec 30, 2015

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SonyKDL-52XBR9 black screen,no sound/picture. Sony&green power light comes on.After28 sec,back lights go off,screen goes black.G7N board puts12v to boards.T-Con board replaced-no change.Bad BU board?


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Jun 30, 2017 | Televison & Video

1 Answer

Horizontal line about 1 from bottom of picture


The t con board or LCD panel of the tv is faulty. Can confirm by replacing the t con board.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Apr 13, 2016 | Samsung Ln32d403 32-inch 720p 60hz Lcd...

1 Answer

When my TV have no logo when i turn it on. I changed the power board and the main board already. The problem still there. I bought a bad main board? Or I need to change my T con board too?


T con board responsible for final picture on screen of set. And visible distortions are caused by it. The inverter board powers the back lighting so you can see the picture. If screen is totally black that could be the issue.

Oct 28, 2015 | Vizio E701I-A3 70" LED TV 1920x1080, 120...

2 Answers

I have a Dynex 32 LCD that I can only see the top half of the picture, the bottom half/40% looks like rainbow lines. What are the possible problems and how do I fix it.


Unfortunately what you have is a fried screen. Toss it at the city dump and get a new TV. Wallmart has 36 and 45 inch TV's for under 300 dollars
Good luck

Nov 29, 2014 | Dynex DX-LCD32-09 LCD TV

1 Answer

Sharp Lc-26sb24u white screen with sound


You will get a white screen when you unplug the t-con from the main board. Doing so removes power to the LCD panel. Verify that all of your voltages from the power supply are correct. If they are, I'd look at the t-con board. It sounds like there is a problem with the t-con that is pulling down the main board.

May 11, 2012 | Sharp LC Televison & Video

1 Answer

No picture, lines displaying


The only board that conttrols the HDMI function on this TV is the main board. The lines on the screen can be caused by this board as well or a bad t-con board .

Here is a link for both boards : Main- http://www.tvpartsguy.com/servlet/the-2760/LG-42LB4D-MAIN-BOARD/Detail

T-con - http://www.tvpartsguy.com/servlet/the-2761/LG-42LB4D-T-dsh-CON-BOARD/Detail

double check your part numbers.

Jan 06, 2012 | LG 42LB4D 42 in. LCD HDTV

2 Answers

HI, I have a 40" Samsung Flat Screen TV (Model:


This will not be easy to be 100% correct as to what part is bad as you can see in my pictures here.
It can be bad main board, T-CON board, Bad LCD panel.
http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

I would try new T-CON since it is the cheapest part, not worth to repalce LCD panel.

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
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
Parts: www.shopjimmy.com
Parts: www.interliquidparts.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, high ripple current, long life rating such as PANASONIC FM or FC series.

Oct 10, 2011 | Samsung LN-T4061F 40 in. LCD HDTV

1 Answer

My TV will flicker at times and go completly black for a period. I unplugged everything and let it sit for about 12 hours and the TV worked fine the next day. The following day the TV again flickered and...


The screen flicker than go blank,does it still have power to the tv set?Yes,than this cause only can be causes by only 2 boards in the tv can causes this problems,if tv power still stable for the set.The T-CON board it shorting out and dying for this problems to happen or worst case causes the Main board tv Tuner signal board it dying.The T-CON board the priced it is cheaper and could cause this problems too.Tries change this T-CON board first,see what happen.This board T-CON board sit at the bottom in the middle of the LCD screen panel to decodes pictures pixel before it go onto the LCD screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON board for the replacement.

Jul 27, 2011 | Samsung LN-T4071F 40 in. LCD HDTV

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