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Dv2000 lcd i bought a new inverter and installed it and still no backlight can view windows if you shine a light on screen pc works ok on external monitor what else do i need to do to fix this problem purchased this in dec 06

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The problem is your display. so you have to buy a new lcd screen. if it would be the inverter, you either wouldn't have display at all or you might see some lines or a greyed screen.

Posted on Mar 10, 2008


You need to take the dim switch out, it is inside the right hinge and the problem is resolved.

Posted on Jan 06, 2008


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1500 has dim screen. Switched screens with working 1500 and screen works as it should. Hooked up external monitor to bad 1500 and had good picture on monitor. So screen is fine. I have tried FN + ^ arrow...

Fn with ^ key? Why? The Display Toggle-Over key is the F8 key.
Fn key plus UP Arrow key is to increase the Brightness.

You hold the Fn key down, and tap once on the F8 key.

(Of course there are at least 3 display options available;
A) Laptop internal monitor ONLY.
B) Laptop internal monitor AND external display device.
C) External display device ONLY.

You may have to hold down on the Fn key again, and tap once more on the F8 key)

You switched LCD screens with a working one, and it works OK.

Reason is you also switched the screen Inverter, too. Correct?

The screen Inverter is mounted to an area at the bottom of the LCD screen, and behind the Display Bezel,

Click on - Service Manual (1817 KB)
It's a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on Service Manual, it may take up to 30 seconds, before the first page comes up.

Click on Display.

An LCD screen does Not produce light,

(Click on the monitor image)

It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or two of them); Or a series of LED's.
(Light Emitting Diode)

The Dell Vostro 1500 series of Notebook PC's, uses a single CCFL for a Backlight.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

Average thickness is -> 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height.

View the last 8 photos.

It is just like Fluorescent lighting used in homes, and businesses also, because it has MERCURY vapor inside.
HIGHLY toxic.

A screen Inverter is used to convert the power, (Electricity), from the laptop, for the LCD screen, and Backlight.

(NOTE* Does NOT apply to laptops that use LED backlighting.
There is NO screen Inverter used)

90 PERCENT OF THE TIME the fault is a bad screen Inverter.

Primer over.

Me? I would buy a screen Inverter, due to the low cost, and ease of accessing to replace, and replace it, and use the old LCD screen.

[ You did check Video Cable connections -> PHYSICALLY, (Try to plug in tighter), on the Video Cable motherboard side connection, LCD screen connection, and screen Inverter connection; correct?]

For additional questions, or to have me clarify anything I have stated above; please post in a Comment.


Nov 11, 2012 | Dell Vostro 1500 Notebook

1 Answer

My laptop comes on but the monitor is blank

Your backlight is probably burnt out or the inverter needs replaced. The backlight will be a pain in the rear to do so you might want to try a new / used (working) inverter in it first. Hook your laptop up to a external desktop monitor. If you computer boots up, and you can see everything on the external display, you've got an inverter or backlight issue. Shine a flashlight on the laptop screen. You'll see a very dim image of your desktop.

Sep 09, 2012 | HP Pavilion dv4000 Notebook

1 Answer

My Laptop Backlight switches off, after windows start-up..I need to get this fix or advice will do..

If you can barely see the icons when you use a flash light to shine on the screen, then you lcd inverter is bad. Replace the lcd inverter and your screen will be ok.

May 22, 2012 | Dell Latitude E5400 Laptop

1 Answer

My samsung r20 backlight keeps going off, if i press the Fn and F5 button it comes on for a second and then back off

If you can see the images on the screen very faintly when you shine a flashlight on the screen, then your problem more than likely is the LCD Inverter. The LCD Inverter costs less than $10, but you will have to disassemble the lcd screen to get to it.

I'm sure you know that you can attach an external monitor to your laptop and hit the FN key and hold it while you hit the correct F1 thru F8 key that will display the image on the external monitor? This could be a solution until you get the inverter fixed.

Now a dishonest repairman will take advantage of you if you take that laptop to them talking about the backlight is going bad. He'll simply bill you $300 and tell you he had to replace the LCD Screen which houses the back light an most times it's easier to replace the screen then fool with the backlight. And in your case all he would do is replace the lcd inverter that sits under the lcd screen and is covered by the strip at the bottom that goes around the lcd screen.

Mar 20, 2012 | Computers & Internet

1 Answer

Screen has gone cloudy?

Kevin, Kevin, Kevin, should have posted your problem here first.

An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, or a series of LED lights.

In regards to the Acer Aspire 7720 series of Notebook PC's, the Backlight is a CCFL.

Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Approximately 2mm Wide, by close to the height of the LCD screen, Tall )

A screen Inverter is used to convert the power (Electricity) of the laptop, for the Backlight, and LCD screen.


The thin plastic frame in front of the LCD screen, (Resembles a picture frame), is the Display Bezel.

The screen Inverter is mounted towards the bottom of the LCD screen, and behind the Display Bezel.

This you already know. Posting for those who read this solution in the future.

Service Manual (Free),

For additional questions please post in a Comment.


Feb 26, 2012 | Acer Aspire 7720 Notebook PC

1 Answer

Im on a laptop and the back light usually just flickers but the screen has gone dark and i have to use a flashlight to see the screen.

Replace the Inverter, rickeyjsmith.

An LCD screen cannot produce enough light by itself. An additional light source is needed.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp. (Lamp = Bulb)
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale in physical size.
(Average size is 3 to 5 inches long, and half the diameter of a No.2 pencil)

An Inverter is used to provide power to the LCD screen, and the Backlight.

90 PERCENT of the time the Inverter is the problem.

Which is a Good thing.
The Backlight is located inside the metal frame that hold the LCD panel layers together.
Usually on one side of the LCD screen.
{Some LCD screens require Two Backlights}

Replacing a Backlight is a job for a trained repair person.
The LCD screen is a composite of layers.

A lot of times the LCD screen is replaced for Backlight replacement, because some LCD screens require this.

Backlights cost more than an Inverter, and of course an LCD screen costs much more.

This is an example of an Inverter for an HP pavilion dv2000 series Notebook PC,

The above is ONLY an example.
An Inverter MUST be matched to THE LCD screen.

Stating Pavilion dv2000 is only stating the series.
The EXACT Product Number is located on the bottom of the laptop in a white Service Tag.
P/N = Product Number

Also, there is an HP part number on the Inverter.
Match the HP part number to the listing for the Inverter you are going to purchase.

A reputable seller will list THE HP part number so that the buyer will purchase THE correct Inverter.

How to replace an Inverter in an HP Pavilion dv2000 series Notebook PC;

1) Service Manual

I'm going to use the HP pavilion dv2000 CTO Notebook PC as an example.
The Service Manual is the same for All of the Pavilion dv2000 series of Notebook PC's,

On this page click on the file name >
HP Pavilion dv2000 Notebook PC Maintenance and Service Guide.

After you click on the above link it may take up to 30 seconds, or more, to see the first page.
In the meantime you will be viewing a blank white page.
The PDF file is downloading in the background.

In the Bookmarks menu to the left, click on the + sign to the left of >
Maintenance and Service Guide.

Click on the + sign next to > Removal and Replacement Preliminaries
Read up on Anti-Static Precautions

Now go back, and click on the + sign next to >
Removal and Replacement Procedures.

Scroll the sidebar down, and click on > 5.12 Display Assembly

Direct information on replacing the Inverter is on Page 152.
(Page Number Box at the top of the PDF file, to the right of the blue Down Arrow)

I use a computer pick to ease up on one side of the rubber Screw Covers. You may have a similar device you can use.
If you are careful with the rubber Screw Covers, you can reuse them.
There is a contact cement on the covers.

Lay them down glue side up on a piece of paper.
(They do like to stick to the computer pick, and your fingers, however. Giving you a 'heads-up'.
Try to keep the glue side from picking up debris, however)

If you need guidance, no matter what it is concerning this procedure, please post in a Comment.

One more thing that pertains to the HP pavilion dv2000, dv6000, and dv9000 series of Notebook PC's, that I think you should be made aware of,


Dec 05, 2010 | HP Pavilion dv2000t Notebook

1 Answer

My screen is totally blank. how can i diagnose what's wrong?

A) Suggest you start with seeing if graphics are being shown, but not displaying on the LCD screen.

May be an Inverter problem.

1) Laptop on, use a flashlight, and shine it at the LCD screen. Shine the flashlight at an angle.

Do you see faint images?

2) Laptop off, plug in a VGA monitor to the VGA connector on the back of the laptop. Turn the VGA monitor on, and turn the laptop on. (Do NOT have the laptop running, and plug the monitor into it)

This is what a VGA connector looks like,

(Photo to the right. The VGA monitor cable's connector is shown to the Left)

Press the Fn key, hold it down, and press the key that toggles over the graphics to an external monitor. The key will have a monitor icon symbol on it. (Empty rectangle)

Do you have graphics on the External monitor?

1) expounded on:

An LCD screen cannot produce enough light by itself.
For this reason an additional light source is provided.

A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp. (Lamp = Bulb)
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

An Inverter is used to provide power for the LCD screen, and the Backlight.

The laptop's power is not enough to power the LCD screen, so the power is increased for the LCD screen by the Inverter.

The power from the laptop is too much for a Backlight, so the power is decreased for the Backlight by the Inverter.

90 percent of the time the problem is the Inverter, not the Backlight.
An Inverter is a small circuit board located within the Display Assembly.

The Display Assembly consists of;
1) The top panel of the laptop that you see with the laptop closed.

2) The LCD screen (Assembly. More on that in a minute)

3) The Bezel. The thin frame in front of the LCD screen, that surrounds the LCD screen. Looks like a 'Picture Frame'

4) The metal frame that holds the LCD assembly together, and it's screws.

5) The brackets that are screwed to the LCD assembly frame, and then the brackets are screwed to the top panel.

6) The Inverter. A small circuit board, (Usually as long as your longest finger, and about the same width), located BEHIND the Bezel, and at the bottom of the LCD screen

7) Wireless Antenna

8) Backlight. Description already provided. The Backlight is inside the metal frame that surrounds the LCD assembly. On one edge. (Sometimes more than one Backlight is used)

The LCD screen is an assembly. What you see on the outside is a protective screen.

If I may;

This is an example of an Inverter for an Everex Stepnote VA4300M,

I await your findings. Post in a Comment.

Nov 20, 2010 | Everex StepNote VA4300M Notebook PC

1 Answer

Screen is black and can not see the images

he best way to see if its a bad power inverter board to the back light or if its the backlight "bulbs" is to shine a flashlight on the screen with the computer running.

If you can now see the text on the LCD then its a "back light" problem, the power inverter or the bulbs.

If you can not see any text its not the inverter or bulb. Try hooking your laptop to a external monitor. If the montior works that means your video card is good and that you more than likly have a failed LCD.

replacing the Inverter and entire LCD is normaly a pretty easy task.
  1. Bad inverter
  2. bad backlight
  3. bad connection
  4. all together bad LCD
None of those problems are expensive to repair.

thank you for using fixya,rate my answer,

Oct 02, 2009 | Toshiba Satellite A305-S6908 Laptop

1 Answer

Screen black out?

Most likely the LCD inverter. The inverter supplies the voltage to the ccfl lamps to light the display. These inverters run about $20 on e-bay.

On my toshiba M105 the problem is the Tab welds at the top of the lcd itself. 1/3 of the screen is not usable but an external screen is perfect.

Apr 14, 2008 | HP Pavilion dv6000z Notebook

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