Question about Vizio m420nv 42 in. LCD HDTV

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I have a Vizio M420NV The top of the picture is cut off. I have reset picture settings back to default and can't get a normal picture. It's like it's always zoomed in.

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Press Menu, picture, scroll down to more, press OK, then press size & position. adjust as needed.

Posted on Apr 03, 2011

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Posted on Jan 02, 2017

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My Vizio m420nv tv the left half of the screen has a yellow tint throught the whole screen. the right hand side is fine. Ive changed the T Con Board and didn't change anything. any ideas?


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.

Dec 01, 2015 | Vizio m420nv 42 in. LCD HDTV

1 Answer

I have a 42" vizio model # m420nv . It has a good picture but has three stripes from top to bottom 6" wide where the picture is a lot brighter . How do I fix this problem?


If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Jun 25, 2015 | Vizio Televison & Video

1 Answer

Vizio M420nv LCD TV Black Screen


lightning can do extensive damage to electronics equipment especially flat panel TV's. I would really recommend a professional diagnosis instead of board swapping. You could have several boards that are damaged!

Feb 13, 2013 | Vizio m420nv 42 in. LCD HDTV

1 Answer

Vizio M420NV Wont turn on


I have a suggestion if you have and are using a box of some kind with this set, remove set and box from power for awhile and then power both back, sometimes a box can trigger this type of event, hope it helps and it cannot hurt to try.

Dec 11, 2012 | Vizio m420nv 42 in. LCD HDTV

2 Answers

Vizio m420nv has no sound or picture


High there!
I want to try this, change the video card ( video audio section ) of the TV

peace .

Apr 21, 2017 | Televison & Video

1 Answer

Vizio m420nv has sound but no picture


Hello there

Actually that problem is very common on all LCD TV,, that problem is cause of either inverter board or t-con..

In this case you don't need to check the voltage that is too complicated for you,,only visual check is enough..

I share you my tricks and hope it helps..

Power on your TV turn off your lights..if you will see the light comes from the screen the problem is t-con..if no light the problem is inverter board (backlight) board

Hope it helps..

Don't forget to rate..

Aug 25, 2012 | Vizio m420nv 42 in. LCD HDTV

1 Answer

Vizio m420nv without a remote


Contact Vizio for part number by model number or Google the model to locate an original (universals are a waste of time and money and often are missing key features needed).

Mar 31, 2012 | Vizio m420nv 42 in. LCD HDTV

1 Answer

How do you get the crispiest picture on the M420nv TV?


Put the TV in the oven! Nyuck nyuck nyuck. Sorry... seriously though, if you use HDMI to hook up your input source to the set you shouldn't have any problem.

May 17, 2011 | Vizio Televison & Video

2 Answers

Picture is cut off at top and bottom


I had the same problem with my westinghouse 47 inch HDTV. It turned out that someone had inadvertently hit the "format" key on my satellite (Direct TV) TV remote controller. If you have satellite TV you might want to check this out. I set it back to the previous setting and I get the entire screen. Hope this helps someone.

Oct 20, 2008 | Vizio L32 32 in. LCD HDTV

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