Question about Vizio GV42L 42 in. LCD Television

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My TV was working one minute and then no picture, but had sound, I replaced the master inverterm but not the slave inverter, still doesn't work, I was wondering if you replaced both inverter boards

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Be sure the inverter is getting 24vdc at the input first. Could be the DC supply too the inverter.......

Posted on Nov 17, 2008


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1 Answer

Inverter board blew out

This is a common problem for this kind of TV.

You just put in a new PCB master and slave board.
Or use a repair-kit and replace the defected parts on the board.


Master - 6632L-0470A PNEL-T707A KIT63

Slave - 6632L-0471A PNEL-T708A KIT63

As used on the LG / PHILIPS LCD PANEL TYPE: LC420WU5

Examples of models that use this panel:


• PHILIPS 42PFL9900D10


• PHILIPS 42PFL7332D37

• PHILIPS42MF337B/37

Jan 09, 2014 | Philips 47PFL7403D 47 in. LCD TV

1 Answer

My 42 inch lcd vizio tv flashes like a stobe lite after a minute of powering it on then goes black what can i do

That sounds like an inverter problem. Check the capacitors on the inverter boards. There will be two on each board. The master inverter will be on the far left side, and the slave will be on the far right side. You will have to remove the metal covers over the inverter boards. Should be 4 small phillips head screws. If the capacitors have bulging tops, replace them.

Jan 15, 2013 | Vizio VX42L 42 in. LCD TV

1 Answer


Check the capacitors on the master/slave inverter boards. I just repaired a Vizio VW42LHDTV10A with the same problem. Cost to repair $2. The master and slave inverter boards should be on the far left and far right sides of the TV set. They both have metal covers installed over them so you will have to remove the covers to access them. I'm willing to bet the tops of your capacitors are bulged.

Sep 23, 2012 | Vizio VW42LF 42 in. LCD HDTV

1 Answer

Vo42l no picture. please help!

I had the same problem. No picture but sound. When I turned on the tv, and shined a flashlight around the screen from about 3 inches away, I could it was displaying something.

At first I replaced the main board which has 0171-2272-2604 stamped on it. You can google Vizio VO42L service manual and get a pdf which will show how to remove the back. I got the board from TSM www.tristatemodule.com3642-0482-0150 3642-0482-0150 Vizio TV Module, main unit, 0171-2272-2604, 3642-0482-0395, VO42LFHDTV10A 1 $88.95 $88.95

Order Notes: None
$88.95 Shipping: USPS Priority $20.00 Tax:
$0.00 Total:
$108.95 However, after I replaced this board I still had the same problem. So next I replaced the Invertor boards. There is a Master and a Slave board to the right and left sides of the main board. I ordered these from Coppell tv.
on Ebay.
6632L-0470A & 6632L-0471A INVERTER REPLACEMENT SET - NEW, OEM, WARRANTY ( 110882329800 ) 110882329800_1.jpg Paid on Jun-08-12
$49.99 -
USPS First Class Package Estimated delivery: June 13, 2012
These are compatible replacement inverter boards and work well. All I had to do was bend a tab on the aluminum cover that goes over the boards. After installing these inverter boards the Vizio display works. I started with main board replacement because from what I read online, the problem was either the mainboard (which had the most posts) or the inverter boards. So I picked one.
Install tips:
Download the PDF Service Manual VO42L FHDTV10A_LPL,AUO Service Manual.pdf for some help with the back cover.
When you take all the screws out, set them aside in the same pattern they were on the board for ease of putting the back in.
I was not able to remove the connector on the Ribbon cable between the master and slave invertor, so I left it attached and carefully undid all the tape and removed the boards attached. I plan to send the old boards to Coppell TV (really nice to work with) for their re-use.
I hope this helps.

Feb 27, 2012 | Vizio VO42L 42 in. LCD TV

1 Answer

Sound but no picture. Two and a half years old.

If this set is under warranty you should return it to get it fix/replace. (Being this old it probably isn't.)
If not then;
This sounds like the inverter/backlight board has failed.
This board controls the back-light for the set.

IF YOU KNOW HOW TO WORK WITH ELECTRONICS REPAIR or have a friend with knowledge/skill you can fix it.

>Unplug the set.
>Remove the back cover.
>Remove the shield cover over the inverter board(s).
>Unplug the cables connected to the board.
>Remove the screws holding the board.
>Put in the replacement board and replace the screws.
>Plug the cables into the board.
>Replace the shield cover over the boards.
>Replace the back cover.

When replace the circuit boards, avoid touching the front or back and handle by the edges to avoid contaminates and static

Get the part number that matches your board.

A search shows that this tv has two inverter boards. The one I show is the Master and the other is the Slave.
(The Slave inverter is sometime called Ballast board;)
If you do it yourself you can replace both to know you corrected the problem.

.You can get this part from several places.

It looks something like;


Feb 16, 2011 | Vizio 42 in. LCD TV

1 Answer

Hi, we purchased our Vizio about 3 years ago and had trouble right from the start however we cannot locate the receipt. The problem is when we turn the TV on it runs for about 4 to 5 minutes then we loose...

Yes,this problems is the 1 or 2 long LCD inverter boards are dead.Replaced these 1 or 2 long LCD inverter boards,will solved this problems.These long LCD inverter boards help the LCD screen have a backlight to produced a picture.Tries websites like, to buy those refurbishes 1 or 2 long LCD inverter boards for the replacement.

Sep 08, 2010 | Vizio VW32L 32 in. LCD HDTV

1 Answer

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.

Apr 03, 2010 | Vizio VW32L 32 in. LCD HDTV

3 Answers

Inverter Board

Disconnect the slave. If the set operates replace it. If not the main is bad.

May 24, 2009 | Vizio VX42L 42 in. LCD TV

1 Answer

Vizio GV47L FHDTV10A

sounds like a lamp failure.

Dec 03, 2008 | Televison & Video

3 Answers

Vizio GV42L LCD TV screen black when turn TV on first time

If you are using a set top box this might be caused by turnig the box on at the same tie as you turn the tv on or slightly after you turn the tv on.  If you are using compnent or HDMI inputs the set needs to see the signal as it is turned on to know what formt the signal is in. 

Oct 15, 2007 | Vizio P2 42 in. HD-Ready Plasma Television

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