Question about Vizio Televison & Video

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I have a vizio Vt470m....the picture has always been perfect. All of a sudden when picture shows scenes with very little light (dark scenes like at night, space, low light) the black color almost look

When there are daytime scenes, or bright scenes on tv picture seems ok...not quite perfect like it was though. Also up close you can see small lines of some sort....

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  • 82 Answers

Either the TCON board or the LCD panel has failed. Start by replacing the TCON board. If the problem persists, the panel is bad and the cost to replace it would be too high.

Posted on Mar 23, 2014

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Posted on Jan 02, 2017

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electronick
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SOURCE: My TV has little green dots all over the picture.

You have the problem called "diffusion" errors, or some call it non-erasing pixels, etc.. You may be able to adjust the voltages to fix the issue. The 2 main voltages are VS and VA. The value they should be is listed on the back of the plasma panel. If one is off, then it could be the cause. Some manufacturers recommend turning up or down vs or va by 10% to fix this type of issue. Unfortunately, it can also be caused by many board in the tv.. power supply (where vs and va are generated) plus also the y and z drive boards, buffer boards, etc. If they are across the whole screen, suspect the power board and Y board most likely. I can talk you through all the adjustments but you will need a dc voltmeter capable of handling 250v. Let me know your skill level and we can fix this together.

Posted on Jan 29, 2009

SOURCE: Black/Dark Colors Fuzzy w/Red Pixel Outline

I have the same problem too....

Posted on Jun 19, 2008

DR NITIN
  • 221 Answers

SOURCE: Green shadows in dark scenes

You should contact Service Center to resolve this issue.






Posted on Jun 18, 2008

  • 1779 Answers

SOURCE: Magnavox 42"

You are correct=====Return it ! It's new, you should not have to have it repaired this soon.

Posted on Sep 23, 2009

  • 8457 Answers

SOURCE: Red rash that shows through in dark scenes. Can't

Might cause magnatic field,form.Try unplug,replug the tv an hour,move it couple inches to the left or right might help.

Posted on Dec 20, 2009

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1 Answer

Delay in lighting from dark to light scenes and then back.


Look for auto-contrast or something. Turn it off. Picture will be steady. I hate this feature in most flat panel tv's and it's not needed. You may have to set static contrast after that.

Jan 30, 2014 | Vizio 60" E601I-A3 Full HD LED-LCD TV

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Vizio VT470M no picture, no sound, no backlight. Power supply board looks good all voltages appear correct (24V, 5V, and 3.7V) and no "bulged" capacitors . When I unplug unit for two hours, the...


Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going wrong on the main board. In the condition where it freezes it (the power on V) which switches everything on i get varied voltages such as 2.5 or 3 or (the normal 5v) and then when nothing powers up (blank screen) i read 0v on pwr on voltage but all my other voltages are corect (24v to inverter, 12 v to main board, 5v, etc.) Im guessing from researching this is that there is in improper voltage somewhere in the main board circuit. I have been unable to find it so i may order another board and post back.

Jun 19, 2012 | Vizio VT470M 47 in. TV

2 Answers

Power light but nothing else on vizio vt470m?


Power board is of course most likely problem here and I presume you found no puffed up caps on the board.
5_16_2012_3_18_55_pm.jpg

May 16, 2012 | Vizio VT470M 47 in. TV

1 Answer

Hi - I have a 42" Vizio and when the scene is dark (takes place at night or credits at the end of a film) the entire screen fades to dark. Help!


Used the tv original remote go into tv Menu goto PICTURE turn on more Backlight like +5 and like Contrast +30.The tv back ground should be alot brighter.

Sep 05, 2011 | Vizio VW42LF 42 in. LCD HDTV

2 Answers

The audio and picture on my vizio vt470m are scrambling and then the whole tv locks up and turns itself off. tried fixing with the "unplug everything, hold power button for 30 sec, and turn back on...


You could have Bad Capacitors on the Power supply board they will be vented or swollow on Top
1000uf 16v 2200uf 10v 3300uf 10v.
PTS they rebuilt boards 1-800-844-7871

May 30, 2011 | Vizio VT470M 47 in. TV

1 Answer

My vizio 47 in. tv lost picture while i was watching news. I tried the flashlight test i was told about on here and can see the picture. how do i fix this problem?


I am pleased you found my flash light test useful. You have a ballast or back light problem. Probably just the ballast unit, so well worth repairing as the expensive bit is OK.
Check the ballast unit before seeking lamps.

Jan 18, 2011 | Vizio VT470M 47 in. TV

1 Answer

Brand new 47" "Edge Lit" LED, model MV4(Cant


I believe there may be another setting, it has to do with auto contrast which can make the TV seems to have high contrast ratio but sometime it does not work right, espically on the scene with dark sky with stars, someitme it will will reduce the brightness to make black real black and you can loger see the stars in the scene. I forget the name of this setting, it may be in the user manual. Do you see that in TV HD mode in other movies with a lot of dark scenes?

Dec 01, 2010 | Televison & Video

1 Answer

My Vizio LCD TV screen fades to dark. Sound stays on.


I w having this same issue when watching a Blu-Ray disc. I found it to be dependent upon what picture mode the TV was set to. By this I mean certain picture modes would cause the TV to dim during dark scenes of a movie. Changing the picture mode helped a lot.

Feb 28, 2010 | Vizio VW42LF 42 in. LCD HDTV

1 Answer

I have a JVC tv only 1 year old and the picture is getting dark.


Sorry to tell you but JVC is a well-known un-reliable brand and if it's cheap, probably even worse. U may have screen burn from leaving a games console on while plugged into the tv, even if its not showing the game, it will burn it onto the screen. :(

Mar 24, 2009 | JVC AV27F476 27" TV

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