Question about Vizio E420VT 42 Class Razor LED HDTV

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Vizio E420VT POWER ON, BACKLIGHT WORKING BUT NOT PICTURE, NOT SOUND

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  • 7 Answers

Replace the main board. that will fix your issue.

Posted on Oct 24, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

ginko
  • 19396 Answers

SOURCE: 42" Vizio - no picture no sound

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

Posted on May 04, 2009

iseeu2
  • 4 Answers

SOURCE: vizio vw42l, the vizio light turns from ornage to

Does LCD screen backlight come on? If so proceed....
USE:CAUTION WHEN DOING THIS....
Try this if repairing yourself...find power supply, small board with no cover over it...check voltages on output pins/plug/connectors (white plugs) three in a row...
1 Plug has 24Volt supply..1 has 12Volt supply and 1 has 5Volt supply when read to ground (screw that holds board in) if you have these voltages it's a safe bet it's the main control board...I just replaced mine and it fixed a problem like yours.

Posted on Sep 02, 2009

  • 15 Answers

SOURCE: VIZIO VW42L I have sound but no picture.

if there is entirely no backlight then yes, however if you just dont have a picture and just a blue screen then it is not the backlight it is the inverters, replace both is recommended.

Posted on Jan 25, 2011

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Hi Tim,
If all the boards you replaced were good and working, the only thing remains is the panel if the backlights are on. Please see that the LVDS cable is carrying voltage to the Tcon board.
Good luck.

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Its the inverter board which is preventing the backlights from coming on very common issue. You can get the replacement inverter from www.tvrepairworld.com

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If the backlights lamps are bad, you will not get picture but will still have sound. Lamps (est. life of 50k hours) are rarely goes out, its electronics that go out first. I do not think the person you talk too ever work on the LCD TV.
More liekly that the 12v (for sound) and the 24vdc (for backlights) power supply section is not working.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

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 22, 2011 | Televison & Video

1 Answer

Vizio vo47L 47" LCD. No


0ne of 3 has failed:
(in order of probability):

1. Backlight inverter
2. Power Supply
3. Backlight

More specifically on #1 and #2 - capacitors either bulging, leaking, or exploded.

Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.

Thanks!@#$

Feb 04, 2011 | Vizio VO47L 47 in. LCD TV

1 Answer

Picture went out on p50hdm Vizio Plazma tv after loud POP


It's either the backlight lamp or backlight inverter is busted due to a power failure or fluctuation. Here's how to determine which is which:
  1. Grab a flashlight.
  2. Turn on the TV.
  3. Shine the flashlight onto the screen.
  4. If you cannot see any display even a faint one, the backlight inverter is dead, else the backlight lamps are busted.
  5. Replace which ever is the culprit.

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1 Answer

No picture on vizio lcd


It's likely not a backlight, but a mainboard. If you are feeling frisky, take the back off and get the model number off the mainboard and check eBay.

Jul 26, 2009 | Vizio P42HD Television

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