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Vizio M420SL LED Smart TV boots on just fine showing the Vizio logo in center of screen then turns to this image. None of the side buttons work after I turn it on.Have to unplug tv to turn it off.


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.

Mar 13, 2017 | Vizio Televison & Video

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Vizio M420SL lcd tv has a shadow in the lower corners of the screen any idea what causes this and what part i would need to replace


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.

Feb 13, 2017 | Vizio Televison & Video

1 Answer

Vizio M420SL


Call Vizio and see if they will give you the button combination to get into Service mode. There is a hard reboot that can be done on your set that may resolve this issue.

Sep 21, 2016 | Vizio M420SL 42 in. HDTV

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VIZIO PICTURE FADING AWAY


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.

May 17, 2016 | Vizio M420SL 42 in. HDTV

1 Answer

HOW DO I MAKE MY VIZIO M420SL TV WORK .IT HAS NO SOUND , MENU , PICTURE.


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Dec 25, 2014 | Vizio 42 in. LCD TV

1 Answer

Why does my vizio m420sl go from green to colred static


If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.

May 27, 2014 | Vizio VP42-20A 42 in. Plasma TV

2 Answers

Ir sensor is not working


check to see if your remote is actually working, If you have a digital camera with an lcd display point the remote at the camera and push a button on the remote, if the remote IR light is working you should see it light up thru the camera when you press the buttons.

Dec 20, 2013 | Vizio M420SL 42 in. HDTV

2 Answers

The ir sensor is not working


The failure to IR sensor inside the TV is a very rare case. Check the infrared emission to the remote control first. Check it with fresh batteries. Make sure that it works well, before trying to replace the infrared sensor inside the TV. If you wish to get some details, http://electronicshelponline.blogspot.com/ Pull up older posts.

Dec 20, 2013 | Vizio M420SL 42 in. HDTV

3 Answers

42" vizio vw42l - no picture or sound


If the backlights for the screen do come on and you also have 12v and 5v feed the main board then it does sound like the mainboard will need to be replaced.

Nov 28, 2009 | Vizio VW42LF 42 in. LCD HDTV

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