Question about Toshiba Satellite A55-S1063 Notebook

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My screen went dark 6 months ago. I thought it was the backlight bulb. Some of what I read says it could be the inverter. How am I supposed to determine which is the culprit? Should I just buy both?

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A backlight problem could be an inverter fault or a CCFL lamp fault. Please click on this link and follow my instruction and possible fix :-

Posted on Sep 06, 2010


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Posted on Jan 02, 2017


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I have a vizio with a dark horizontal band across the screen all the l e d s were replaced 1 yr ago how can i tell if this is digital burn or a led thats out

Panel has failed...Do not order a Tcon board it will not fix this issue..I miss read the post thought it was a black line but you said dark, suppose that could be LED's, did you turn the backlight setting down from the factory setting of 100 when you replaced the lamps before, if not chances are your right back where you were at a yr ago

Dec 14, 2017 | Vizio Televison & Video

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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.

Feb 25, 2012 | Vizio 42 in. LCD TV

1 Answer

Screen is dark but icons are barley visible.

What you have is an inverter failure most likely. The inverter takes the AC adapter voltage and converts it to high voltage AC for the backlight bulb. Backlight bulbs rarely fail but the inverters do. Ebay has inverters for around 15-20 bucks. The inverter sits under the lcd panel behind the screen bezel. In most cases, removing the bezel is all you need to do to change the inverter out. Below is a link to the service manual for that model.

When you click on the link go to page 4-61, this is the start of the lcd disassembly. I thing just 4 screws need to be removed and then take your finger nails and pry off the bezel in a small area and work your way around the screen until the bezel comes loose. When replacing the bezel always start at the bottom between the hinges and work your way up and around.

Jan 18, 2010 | Toshiba Satellite M55-S135 Notebook

1 Answer

Lcd of my gateway laptop lost ligth inside so is to dark but i can see the destop icons but is to dark

Your Backlight bulb has burned out, or the Inverter for it.
1.General information on replacing a Backlight lamp,
2.General information on replacing an Inverter,

May 28, 2009 | Computers & Internet

1 Answer

No Backlight on an ACER 4620

I don't have an exact answer, but some thoughts & ideas.

It really does sound like an inverter. Is the screen the EXACT model as the other one you replaced, and is the inverter the EXACT one. One that is similar may not work.

The faint image is either a bad bulb or inverter. If that screen has never powered up and lit up, you might have a screen with a bad bulb.

I would leave the blame to the motherboard last. Your symptoms seem more like the inverter or bulb in my experiences.

Apr 02, 2009 | Acer Aspire 5100 Notebook

1 Answer

Screen has gone dark but still have the audio

Hello michaelso348,

You can try to take these people to court but they will win. Here is why, your TV is 25 Months old, or should we say over 2 years old, which is far past the standard warranty given on modern electronics. Therefore, this means that they are within their rights. Now, for finding the cause of your problem and providing a solution to it:

This is a common problem; either the inverter or the back light has malfunctioned. The inverter takes AC turns it into high voltage DC and then uses that to power a fluorescent light element (backlight).

You will need:
A service manual (to find the voltage levels and signal levels to compare with the measured values)
A multimeter (to measure the voltage levels at the prescribed test points)

Now, after finding the inverter board, use the service manual to guide you in testing the prescribed test points and determining if the problem is the inverter or the backlight. If the problem is the inverter, use the service manual instructions on how to remove the board properly.

If the backlight is bad, use the service manual to guide you as to how to remove the screen in-order to get to the backlight.

I hope this helps,

Thank you,


Mar 11, 2009 | Samsung LN-S4692D 46 in. LCD HDTV

2 Answers

I have a Poloroid LCD flat screen, 42", bought it at Walmart 13 months ago. around 2 months ago the picture stopped staying, the screen goes to black. We have sound but no picture. we were re-booting and...

Hi pdooley1, I will be happy to help, We need to check the backlight, the easiest way to do this is, 
  1. Turn tv on to a point you have sound.
  2. Take a flashlight or a lamp with a bare bulb and shine it on the screen.
  3. Look very closely at the screen and see if you see a dark video image.
If you can see an image you have a bad backlight inverter. let me know what you find and I can assist with replacement. Please rate this solution. lone99star

Jan 13, 2009 | Televison & Video

2 Answers

Dark monitor on dell inspiron 6000

Chances are that you back light is out AKA new inverter board time.
Here is more info on it
And here is a link to a replacement

Dec 08, 2008 | Dell Inspiron 6000 Notebook

2 Answers

Notebook screen stays dark

Make sure you check under a bright light that you can actually see the image.

This model is notorious for a bad video card (Radeon) that makes it seems like something is wrong with your screen but if you press down just above the keyboard it will work while you are holding it.

If you see an image you have one of two things:

Bad inverter
Bad backlight bulb

If you saw the screen turning pink or red on cold starts before your backlight is burned out and it's just faster and easier to replace the LCD.

If you just saw a flicker and then screen went black the inverter is the problem.

The inverter is a little circuit board that sends power to the backlight bulb, so even though the bulb is good it won't get power to light up. If the bulb is bad replacing the inverter won't change anything.

The inverter is located just below the LCD. Disconnect AC and remove battery.

Remove the rubber plugs along the top and the two oval stickers on the bottom corners. They cover the screws. Remove the screws and carefully pop off the bezel with your fingernails moving around the edge as you go.

Under that you'll see the inverter. Use a fingernail or flatblade to carefully pry the connector off and then unplug the wire harness on the other end. Install the new part. Test it.

If it's working, then reassemble. If it's still dark the backlight is shot or your inverter was a dud.

If it's the backlight, you can remove the screen now that it's open. There are just a few more screws on each side of the LCD and removing a couple on the lower brackets can help you temporarily raise the screen up from the lid to more easily access the screws on each side.

The connector on the back is very delicate. Walk it out with your fingernails and try to reuse the tape if you can. Never pull by the wires.

Replace and test again.

Again, make sure you can POSITIVELY see an image on the screen before doing this repair.

As i mentioned earlier the X1000 has a bad video card the makes the computer boot up and show a black screen and even boot into windows but will NOT display video on the LCD or even the EXTERNAL video out. You can test this by plugging it into a desktop monitor.

That will be $300 please!

Jun 02, 2008 | Compaq Presario X1000 Notebook

3 Answers

Screen seems dead, but comes alive once in a while

 Sounds like it is a problem with the backlight. Or the switch controlling the backlight.

Oct 14, 2007 | Computers & Internet

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