Question about Vizio Televison & Video

2 Answers

Hello! I am trying to fix a Vizio LED TV that does not power on at all and has no LED lights lit, and have followed a few YouTube videos. I dont have all of the details of the TV in front of me but the Model Number is e480i-b2. I have tested the voltage from the SB 5v source and found that the voltage fluctuates up and down between about 4.5 to 6.5. When I disconnect the supply to the main board, the SB voltage goes to 0. I have checked all of the capacitors and everything else I could and everything seems to test fine and visibly look perfect. I have search this symptom over and over again and cannot seem to find anyone that has reported their SB powers fluctuating up and down. Due to the videos I have watched I have already ordered the main board hoping this will fix it, but I’d like to know what would cause the voltage to fluctuate up and down like that. I saw one video where they thought it was a capacitor. Thank you very much for your help!!

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Vizio Master
  • 2,800 Answers

Your power board has issues if you don't have the stand by 5 volt supply, that is the rail that feeds the voltage to the main processor and without that the set is totally dead, no standby voltage or anything...chances are you have a shorted mosfet in the board and its back feeding with the main board plugged in...but it may be easier to replace the power board, unfortunately there is no chance of the main fixing it if you don't have any SB voltage, the reason your getting the fluctuating voltage on the SB rail is the hot side of the power supply is always on, with power factor correction off so there will be some voltage coming across to the lower voltage supplies via the main board, it should be an easy fix with a new power board...good luck.

Posted on Mar 17, 2018

Ad

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Vizio Master
  • 2,005 Answers

Unplug the set wait an hour then with a magnfying glass look at all your "can" capacitors on your powerboard if any of them are rounded on top have pinholes on the top they are bad replace them capacitors charge then discharge power if they are only working partly as a group you will have voltage fluxuations and not enough power to turn the set on

Posted on Mar 17, 2018

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Tech4lfe

Neil Frazier

  • 42 Answers

SOURCE: Westinghouse LTV-32w6 power light on, no video, no sound

One thing is to make sure the inverter board is unplugged when testing the voltages. A shorted inverter will shut down the power supply if the fuse dosen't blow first. There are fuses that don't look like fuses so they can be missed. The next thing would be to look for a connector from the main to power supply and see if there is a pin labeled power on or p.on or similar. The main board should turn this line high(5V) when you push the power button. If not you probably have a bad main board. Unless you can find good used boards they are both expensive. Around $200 for PS and $300 for main.

Posted on Jul 06, 2008

Anonymous

  • 30 Answers

SOURCE: power supply is bad on philips plasma 50 inch tv, it just clicks

nice job... thats the most common problem with all LCD tv's now

Posted on Jul 21, 2009

budmrtn

Bud Martin

  • 11361 Answers

SOURCE: Protron PLTV-3250 back light inverter?

I use hair dryer for locating bad electrolytics capacitor for almost 30 years. When its warm up the chemical reaction works more than when it is cold, that is one symptom of bad electrolytic cap. When you cool down the cap with freeze cooler then the set will stop working again. I would say go ahead and replace those capacitors on th inverter board, make sure to use low ESR capacitor such as PANASONIC FM series from DIGIKEY.COM. I use these cap for repair for many many years with great reliability. The inverter board should have 24vdc feeding it.

Posted on Dec 09, 2009

Testimonial: "Thank you very much for the information. This inverter board is not a typical push through hole type board, anything i should be aware of doing this?"

scott201201

Scott Henderson

  • 170 Answers

SOURCE: WD-62525 My tv wont work. new lamp does not work. have tried ever

Check all fans incuding the one on the cage of the lamp. if they spin when you turn the set on then they are ok. the color wheel needs replaced. if you can't replace the color wheel then order the optical engine.

Posted on May 19, 2010

ginko

Ginko

  • 19396 Answers

SOURCE: how do I test the y-sustain main board from a

Hi.

As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.


Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.

Regards.

Ginko

Posted on Sep 13, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Vizio LED E55oI B2E tv screen went black. Sound still works.


There are two possible problems maybe three the first one is that TV is known for having this issue if you shine bright light on the TV screen and you can still see a picture but it is dark and un lighted then that indicates that the TV has bad LED or CFL lighting inside the panel this is difficult to fix but it can be done number 2 if the TV has sound but the panel glows if you tap on it in the panel close and you can see that the lights are still on then you know the problem is a defective panel LCD in either case you would most likely need a shop to fix this you won't be able to do it yourself you can watch some videos on YouTube though it show how replace led strips on vizio YouTube

Mar 13, 2018 | Vizio Televison & Video

1 Answer

Vizio tv power button will not stay lit fades and shuts down in about 10 seconds. No backlights no backlit screen. Vizio mod # e420i-ao. any ideas. trying to check voltages but don't know If I can.


In most of the case, the problem is defective LED back lights strips, the other problem could be a defective main board.

If you have a LED strip tester, check out the LED strip first, if you don't, try a new main board first, if the symptoms are the same, for sure, the problem is LED strip(s).

Aug 24, 2017 | Vizio Televison & Video

2 Answers

What are the symptoms of a bad psu for vizio m550nv


Vizio 0500-0612-0030 Power Supply / LED Board for M550NV

www.shopjimmy.com/vizio-0500-0612-0030-power-supply-...

ShopJimmy
$77.42 - ‎Out of stock
This Vizio 0500-0612-0030 Power Supply / LED Board for M550NV (0500-0612-0030) works for these ... The odds we'll get it soon: Bad (What does this mean?).

Vizio 55" M550NV 0500-0612-0030 LCD Power Supply ...

electropartsonline.com/vizio-55-m550nv-0500-0612-0030-lcd-power-su...
Vizio 55" M550NV 0500-0612-0030 LCD Power Supply Board Unit Motherboard. ... Any tears or bad connections between boards must be replaced FIRST. 2.

EASY HOW TO FIX LED Vizio TV- no power - YouTube

? 6:13
https://www.youtube.com/watch?v=9xZcTWr2yV0
Nov 5, 2013 - Uploaded by Tampatec
DiY How to Fix led / lcd Vizio TV service repair - no power service repair ... I can not get it to power on so I ...

Jan 17, 2016 | Vizio M550NV 55 in LCD HDTV

1 Answer

Vizio m550nv amber light is on but tv will not power on


EASY HOW TO FIX LED Vizio TV- no power - YouTube

? 6:13
https://www.youtube.com/watch?v=9xZcTWr2yV0
Nov 5, 2013 - Uploaded by Tampatec
DiY How to Fix led / lcd Vizio TV service repair - no powerservice repair review guide no red blinking led ... Theorange/amber light turns on when plugged in. But the TV won'tturn on after that (the light does not turn white).

Vizio TV logo Flashing (Blinking), TV will not turn on, not ...

? 4:01
https://www.youtube.com/watch?v=MDzCzZdgbdg
Jan 5, 2012 - Uploaded by Leo P
This is model XVT3D424SV, I was watching a DVD, I switched the input to TV, tried to connect to netflix, it was ...

HOW TO FIX VIZIO TV - What causes no power - YouTube

? 5:53
https://www.youtube.com/watch?v=5k1Mc1f6O3E


Jan 17, 2016 | Vizio M550NV 55 in LCD HDTV

1 Answer

So my TV will NOT come on. I turned it on and it went off and now will NOT power up. No lights, nothing. I tried manually and remote. Electrical outlet tested and works.


Easiest TV repair - How to Fix Power [TV turns off, freezes ...

? 6:44
https://www.youtube.com/watch?v=OKklZpTGBGU
Apr 27, 2014 - Uploaded by Keith Fox
This tv will not turn on. I took it to a tv ... same here my lg tvkeeps turning of and won't turn on. Read more ... It will comethough.. Read more ...

EASY HOW TO FIX LED Vizio TV- no power - YouTube

? 6:13
https://www.youtube.com/watch?v=9xZcTWr2yV0
Nov 5, 2013 - Uploaded by Tampatec
DiY How to Fix led / lcd Vizio TV service repair - no power service repair review guide ... u re look l?ke my teacher bro :) ? learn much way amaut tecnic repair from you, thx for .... plug it in the orange logo stays on...will not power on....its a vizio 37 ... Now it willcome on after half and hour of pressing power.

Television will not turn on? ' Yahoo Answers




Dec 29, 2015 | Televison & Video

1 Answer

How to fix vizio tv that turns on but no picture


LCD & LED TV Repair - No Image & Blank Black Screen ...

? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LED & LCD TV How to Diagnose Symptom of No Image on the Screen ... Was working fine and now blank ...

LCD Easy Fix (sound but no picture) - YouTube

? 4:52
https://www.youtube.com/watch?v=IBRE1Dcyxp4
Jan 13, 2012 - Uploaded by Clay Whitehead
My tv stopped working, it had the sound but no picture, so I did a little research and fixed it. ... vizio E701i-A3E ...

Vizio LED TV Repair - TV Has Backlights but no Image on ...

? 5:06
https://www.youtube.com/watch?v=fSCf1xxLjNA
Aug 27, 2015 - Uploaded by ShopJimmy.com
Basic Troubleshooting Help if your Vizio LED TV has a blank screen and no ... It is on an UPS but turned off ...


Dec 10, 2015 | Vizio M3D650SV 65 inch Class Theater 3D...

1 Answer

How do I know if I need to replace the main board?


Vizio TV Repair - How to Install Vizio LCD Motherboard ...

? 6:21
https://www.youtube.com/watch?v=B_ae3f7C3jQ
Feb 20, 2012 - Uploaded by Brady Smith
Learn how to replace your LCD Visio TV motherboard and hear a few facts ... ANYBODY KNOW HOW TO FIX OR WHAT NEEDS TO BE FIXED IF THE ... I have found that I need to replace themainboard in my vizio 42 inch. .... hey, man. can you help me out? i got a VIZIO E3D320VX from ebay brand new.

Vizio 3632-1512-0150 Main Boards Replacement for ...

? 2:48
https://www.youtube.com/watch?v=a_8URZW356E
Dec 6, 2012 - Uploaded by ShopJimmy.com
Top Common Vizio LCD TV problems for bad Main Unit Boards:... To be best prepared to replace the Main Board inside of yourTV, you will need the following ... If you have any further questions regarding your repair, simply post a ... i can see on one of the small black squares (sorry i dont know what they ...

Vizio TV Repair - E601i-A3 Main Board Replacement for No ...





Dec 08, 2015 | Vizio XVT473SV 47 in. LCD HDTV

2 Answers

Tv not turning on


May I know if it has a led light at the front panel? Also, please confirm if your model no. is VW37L.

Oct 04, 2011 | Vizio VW37L 37 in. LCD HDTV

1 Answer

Vizio GV47LFHDTV10A No Video No Sound after "POP"!


change the main board first. if you're lucky this will fix the problem if not your inverter is dead.

Mar 03, 2009 | Vizio GV47LF Television

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

472 people viewed this question

Ask a Question

Usually answered in minutes!

Top Vizio Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76204 Answers

Tony Nguyen
Tony Nguyen

Level 2 Expert

96 Answers

CoppellTVRepair.com

Level 3 Expert

778 Answers

Are you a Vizio Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...