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gary peacock Posted on Dec 30, 2018
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Ea21va 42 vizio with strobing backlight and black screen.What board should I replace?

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matt martin

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  • Vizio Master 1,259 Answers
  • Posted on Dec 30, 2018
matt martin
Vizio Master
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Joined: Apr 13, 2009
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Unfortunately, it not a board problem. The LEDs in the TV are bad. These are nearly impossible for repair. As a servicer for television I have repaired many of these. As they were are under warranty, replacement panel is needed for this repair. To purchase a pane,l is not cost effective. What is the panel ? In the old TV, you know what a picture tube is. Well that picture tube in the TV today is the panel. Thanks for asking, Matt of Martins TV Repair.

5 Related Answers

Anonymous

  • 36 Answers
  • Posted on Jan 17, 2009

SOURCE: VIZIO BLACK SCREEN

That problem is the Ysus board, Sometimes people will replace the Zboard at the same time. If you bought it at costco a couple of years ago you are in luck costco will refund your purchase price, costco has changed the return policy and newer tv's are not refunded, but something to look into

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Anonymous

  • 557 Answers
  • Posted on Sep 25, 2009

SOURCE: I have a 42'' plasma is it worth fixing it

Definitely worth fixing. You may be able to locate an inverter on the internet. Try ebay first. Have seen the inverter for that set for under $50.00

nicknovikov

Nick Novikov

  • 101 Answers
  • Posted on Oct 05, 2009

SOURCE: how much do amain board cost on a 42 inch vizio tv

shopjimmy.com.check this site.

Anonymous

  • 67 Answers
  • Posted on May 24, 2010

SOURCE: Vizio VO37LFHDTV10A. The screen is black but I

the backlight inverter might be out

Testimonial: "I will order one and give it a try - THANKS!"

Anonymous

  • 7 Answers
  • Posted on Feb 25, 2012

SOURCE: Replacing a Vizio Backlight Inverter

I have a television that did this. The picture went out but it continued to have sound. It was the projector bulb. I ordered from a dealer on ebay, very resonably priced. It came with instructions on how to install it and was a very easy fix.

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I have a vizio 42 inch model VO420E serial# LUKECAK1409419. when i turn it on i get a black screen but i have audio. it does this in every input. what can i do to fix this problem?

Most likely you have a backlight problem. To verify this, dim the lights in the room. Take a bright flashlight, turn on the set, and shine it on the screen. If you see a faint picture, you have a backlight fault. Your backlight inverter may be built into your power supply board. If this is the case, you will have to replace the inverter/power supply board
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GV42L FHDTV10A CCFL & Inverter Board issue

Is the strobe light affect the entire screen? or just a part of the screen? I would say you either have a problem with the inverter circuit or power supply. You need to ensure that the inverters are being fed a clean 24vdc. If you are getting ripple voltages in the 24vdc power supply, your backlights will flicker. Also check the inverter boards and also the power supply capacitors for any bulging tops. I would also suggest you monitor the "backlight on" signal from the main board. It should be around 3.3 Vdc and again no ripple.
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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!
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42 inch screen has a strobe effect when turned on. Picture is there and sound is there but watching it flutter for about 5-10 minutes then goes away. I was told it is the backlight. .

MOST LIKELY YOU HAVE FAULTY CAPACITORS ON THE INVERTER BOARDS. THEY SHOULD BE 470UF 35V TYPES. THERE SHOULD BE 2 ON EACH INVERTER BOARD. If the tops of the capacitors are bulged, that's most likely your problem.
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Vizio vo42l fhdtv10a has no video with backlight on.

May or may not be worth fixing depending age and cost of set when new--if backlights on could be power supply (NEED TO CHECK all voltages out of power board) or even a main board etc---
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Partial blacking / shadowing of the screen

Sounds like the backlight inverter board is going out, or possible backlight ccfl going bad. The inverter board can be replaced but the actual ccfl's may not be able to, depends on the repair shop's in your area.
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Vizio lcd 42" It take too long for the picture to come on I can hear the sound it can take from 15-30 minute before I can see the picture. I replaced the power supply board but did not solve the problem.

You need to look and see if the 24vdc feeding the backlight inverter board disappears when the screen goes black, if the voltage is OK, then the problem can be the backlight inverter baord, it is either bad or not getting the ON signal on the ON/OFF pin from the main logic board.
http://www.shopjimmy.com/catalogsearch/result/?q=Vizio+GV42L+

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
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Flickering t.v.

Is the backlight still on? If so bad lcd controller board
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