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M260va backlight inverter

How do I know if my backlight inverter is bad

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Shuttle83
  • 1139 Answers

SOURCE: Inverter opertion

Hello davidweldon,

If the inverter board is bad, I would suggest that you replace the whole board unless you have a SMD (Surface Mounted Device) rework station, and a background in electronics. I have worked on TVs where people have tried to remove SMDs and it never is an easy thing to do, so I would again suggest that you replace the whole board, because all of the components are SMDs.

Now as to your question, I have seen on these sets the majority of the time it is a driver transistor that goes bad.

I hope this helps,

Thank you,

Shuttle83
www.electron-age-technologies-llc.com

Posted on Nov 28, 2008

  • 58 Answers

SOURCE: "Upgrade" of Backlight Panel

just replace what failed.
I replace the surface mount FETs on the inverters.

Posted on Dec 06, 2008

dduncan774
  • 760 Answers

SOURCE: 32 in olevia 332-b11 tv and the color is going bad

It is neither. Your inverters do not control your picture color. All they do is power the back-lights. If your color is going out, odds are it is in your main board.

Posted on Apr 11, 2011

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1 Answer

Vizio M260va,has power and audio but no back lighting. Flashlight test shows that there is an image on the screen just no lighting. have taken apart the unit, no visible signs of failure. not sure what...


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/

Jan 30, 2015 | Vizio M260VA 26 in. HD-Ready LCD TV

1 Answer

Brightness buttons (f2 and f3 are not working


Not a lot to go on here, Prabhdeep

Need the full model information

Example,
Acer Aspire 5535-5050

Post back in a Comment, or Reply; at end of this solution

Primer:

An LCD screen does not produce light,

http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/BehindTheScenes/Optics101/

Click on the monitor icon

Because of this the LCD screen needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or more than one), or a series of LED's.
(Light Emitting Diode)

CCFL = Cold Cathode Fluorescent Lamp (Bulb)
Similar to Fluorescent lighting used in homes, and businesses; but on a MUCH smaller scale.
Average thickness is 2mm, or a little more than 1/16th of an Inch.
Or about the width of this capital letter -> O <-
Average length is almost as long, as the LCD screen is in height.

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

View the last 8 photos

(Do they break easily when trying to remove, and replace?
OH, YES!)

A screen Inverter is used to convert the power from the laptop, for the LCD screen, and Backlight.
If the laptop uses LED backlighting, it MAY or MAY NOT use a screen Inverter.
Generalized thinking (Can also be stated as 'Rule of Thumb'), is that if the laptop uses LED backlighting, it does NOT use a screen Inverter.

I also feel into this line of thinking, since none of the LED back-lit laptops seemed to use a screen Inverter; that came to the shop.
I have found this to be a fallacy from on here,......FixYa.....
I have looked up two laptops using LED backlighting, and discovered they also used a screen Inverter.

Now I post LED backlighting may, or may not use a screen Inverter.
Seems when LED backlighting first came out, a screen Inverter was used on some models.
Also seems as the LED backlighting technology progressed, no screen Inverter is used.

90 PERCENT of the time, the fault for bad Backlighting can be attributed to a bad screen Inverter.
Of course, this IS IF the laptop uses a screen Inverter.

For a laptop with LED backlighting that does not use a screen Inverter, and backlighting is bad (Dim, or non-existant), the next hardware part in the diagnoses to replace, is the LCD screen.

I now await the information I asked for above.
Then we can diagnose together.

Regards,
joecoolvette

May 09, 2013 | Computers & Internet

1 Answer

No backlight


A) Replacement LCD screen backlight could be bad.
Happens. Sometimes you get a bad part. (Bad LCD screen assembly, in this case)

LCD screen may not be the correct one.

http://support.gateway.com/s/Mobile/2008/GodzillaFX/2528410R/2528410Rsp2.shtml

http://support.gateway.com/s/Mobile/2008/Godzilla/2528407R/2528407Rmv.shtml

A screen Inverter, and an LCD screen; are a MATCHED unit.

B) Screen Inverter:
May be bad, or the Wrong one

C) You may not have the screen Inverter, connected correctly to the Backlight.
Connections aren't tight.

D) The Display Cable TO LCD screen connection may not be tight, or correctly connected.

I know the display shows graphics, but a poor connection of Display Cable to LCD screen, can make the Backlight dim out.

I'm betting it is a poor connection, or the wrong screen Inverter, or wrong LCD screen.

Regards,
joecoolvette

(Be shame to kick that laptop to the curb. Nice laptop)

Jan 07, 2013 | Gateway P-6860FX Notebook

1 Answer

Sound but no picture just 1year old


This looks like a problem with the inverter/backlight.
Turn on the set. (Take a quick look at the backlight setting in the menu just to be sure)
Take a bright flashlight and place it against the screen. Look around the edge of the flashlight for a moving image. This would indicate a bad inverter. The inverters supply voltage to the fluorescent backlight.

IF you know how to work on electronics you or a friend with knowledge/skill can replace the inverter board. You did not give a make and model so I do not know the part number.

You can look on www.shopjimmy.com, eBay, http://www.tvpartsandmanuals.com/
for an inverter board.

Feb 14, 2011 | Televison & Video

1 Answer

The screen is dark but i can see the desktop icons


The backlight is out - two causes. The Inverter is bad or the backlight florescent bulb itself is bad. You can check the inverter by plugging in a know good lamp to its' output. Becareful because it produces a very high voltage enough to shock you. Usually, the inverter goes out. You can connect an external monitor to the VGA output and see if produces an image. If it's good, more than likely the above components are bad and it's not the motherboard.

Oct 28, 2010 | Computers & Internet

1 Answer

The screen keeps going black, can still hear the sound and can change channels etc, just can't see anything. When it is switched on I get a picture for varying degrees of time sometimes hours, sometimes...


Jul 19, 2010 | Samsung LE40R73BD 40 in. HD-Ready LCD...

1 Answer

Power lite comes on but will not boot up. no post no nothing


can be bad hard drive burnt out backlight ,bad display power inverter or bad motherboard. to see if it is backlight shine flashlight into screen if u see desktop then your backlight or power inverter is bad.

Aug 03, 2009 | Gateway MT3422 RTL Notebook

1 Answer

"Upgrade" of Backlight Panel


just replace what failed.
I replace the surface mount FETs on the inverters.

Dec 03, 2008 | Sony BRAVIA KDL-40V3000 Television

2 Answers

Insignia NS-32LCD Backlight or Inverter bad???


If you've done the flash light test, it could be the inverter board became defective but it could also be that the power supply does not provide the +24VDC to the back light inverter board.
If you could do the +24VDC test using a voltmeter then we can say for sure that the back light inverter board is defective.
Let me know if you need further assistance.

Aug 21, 2008 | Insignia IS-LCDTV32 32 in. Television

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