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Need to replace led inverter

Where can i find a schematic or can you give specific instructions on how to replace an led inverter and mine is a 17"

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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 | PC Laptops

1 Answer

I have sony vaio vpceh25fd ,my screen was broken but was still working before i replaced it to a new one,after replasing the screen i am having a very dim display.even i tried the previous (broken lcd) its...


The dim display could be caused by a faulty inverter. The inverter supplies high voltage to the CCFL lamp that provides the back light to the LCD screen.

If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Apr 14, 2013 | PC Laptops

1 Answer

Are the display bands compatible?


1) Toshiba Satellite P300-13j LCD screen example,

http://www.screentekinc.com/Toshiba_Satellite_P300D-13J--17-inch--1440x900-wxgaplus-laptop-lcd-screen.shtml

Thin Film Transistor (TFT) Active Matrix LCD screen, that is WXGA, and uses one CCFL for a Backlight.

2) http://www.lcds4less.com/ToshibaLaptop__Toshiba_Satellite_P300D-12L__laptop-screens.html

Thin Film Transistor (TFT) Active Matrix LCD screen, that is WXGA, and has 1 CCFL for a Backlight.

There is a pretty good chance. The screen Inverter and LCD screen are a matched unit. I would remove the screen Inverter from the P300-12L, and use it also.

Looks like this,

http://www.lcd-inverter-shop.com/Toshiba/Toshiba-Satellite-P300D.html

If I may ask;
1) Is there obvious damage to the LCD screen?

2) If there is not obvious damage to the LCD screen, have you used an external VGA monitor with the laptop?

To see if the problem is the graphics chipset, or the video cable, or inside the Display Assembly.

A) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-P305/take-apart-notebook-1.htm

B) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-P105-P100/remove-lcd-screen-inverter-1.htm


Post back in a Comment.
Regards,
joecoolvette

[Primer:
An LCD screen cannot produce light by itself,
(Click on the monitor icon,

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

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.

LED stands for Light Emitting Diode

CCFL stands for 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.

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

Observe the last 8 photos especially. This article shows you that the LCD screen is an assembly. It is composed of layers. Just like the 3M company's tutorial. Also shows general instructions for replacing a Backlight.

A screen Inverter is used to convert the power from the laptop, for the LCD screen, and Backlight.
It is a small circuit board, and is usually mounted towards the bottom of the LCD screen, and behind the Display Bezel.

A CCFL, (Or two of them), uses a screen Inverter.
LED backlighting however, may or may not use a screen Inverter.

Using LED's for backlighting is relatively new, when discussing backlighting technology.
Some of the first designs of LED backlighting does use a screen Inverter.
Newer designs do not seem to.

90 PERCENT OF THE TIME the problem can be attributed to a bad screen Inverter.

Aug 21, 2012 | Toshiba Satellite PC Laptops

1 Answer

Display not centered, no access to vertical scroll bar


That's because the LCD screen is going bad.

I would have said the screen Inverter, but the LCD screen uses LED's as a Backlight, and uses no screen Inverter.

http://www.screenaid.com/asus-eee-pc-701-laptop-lcd-screen-89-wsvga-glossy-led-p-36730.html

The above is just an example. Shop around for a better price, but advise make sure it is a reputable dealer. (I do NOT advertise for anybody)

1) http://pskillenrules.blogspot.com/2008/05/dismantling-eee-pc.html

(You can click on the photos to enlarge)

Found this recently. I feel number 2 adds to replacing the LCD screen, and number 3, also adds another idea for those who may be interested,

2) http://www.r3uk.com/index.php/tech-tips/34-disassembly-guides/78-asus-eeepc-model-4g-disassembly

Steps 1 through 10, THEN Steps 17 through 22. (You just want the LCD screen replace instructions)

3) http://www.youtube.com/watch?v=N8-BbOWVgXg

Regards,
joecoolvette

Jun 10, 2012 | ASUS Eee PC 701 Notebook

1 Answer

No backlight on hp pavilion dv8000 17" monitor


If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

May 10, 2012 | HP Pavilion PC Laptops

1 Answer

Black Screen on start-up. Laptop works and LED lights are on. I did a Hard Reset but screen is still black.


Hook up an external monitor to the laptop. See if you get video on it. If you do, then your LCD screen or your Inverter board is bad. If you need instruction on how to replace the screen and where to purchase a new screen, let me know.


If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response. Happy Holidays!

Thanks, Joe

Dec 22, 2010 | HP Pavilion N5350 Notebook

1 Answer

Need replacement LCD Display Screen for my HP Pavilion dv9730us 17" Notebook PC Laptop. Where can I get one for a low price?


If the LCD screen is not physically broken ie a cracked screen then it could have a faulty inverter or a faulty CCFL lamp which will give you a black screen. The inverter and CCFL lamp is a lot cheaper to replace than a complete new LCD screen.
Check out LCD Parts WEB site for service, parts and DIY info. Click on this link to their WEB site :-
www.lcdparts.net

Feb 05, 2010 | HP Pavilion dv9730us 17" Notebook PC -...

3 Answers

My dell e1404 laptop is having a issue with the screen. When you turn on the computer the screen will come on for about 30 seconds and then go off. When it's on everything looks normal. once it goes out...


The inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. The inverter board converts low voltage DC power (few volts) supplied by the motherboard to high voltage AC power (few hundred volts) needed for the backlight lamp.
When the inverter board works properly, the backlight lamp gets power and the LCD screen lights up. As a result, the image on the screen is bright. If the screen is dimming down, means that the inverter is failing in it;s job to supply the needed voltage to the Backlight.
The Inverter is mounted underneath the display screen and is connected by a two wire plug.

Nov 07, 2009 | Dell Inspiron E1405 Notebook

1 Answer

I have an aspire 1711 SMI, who doesn't work properly since several months. The display was starting to fall down and now there's no diplay at all, completely black. Now, when I start the notebook, the...


Hi

This is a common problem. The problem is the inverter. I changed mine OK. Actually I changed the inverter once and the whole LCD screen twice! Now happy with working 1711.

two inverters here on ebay

http://cgi.ebay.com/ACER-Aspire-1700-1710-LCD-INVERTER-1702-1711-1712-1714_W0QQitemZ150404840875QQcmdZViewItemQQptZUK_Computing_LaptopAccess_RL?hash=item2304d3bdab

http://cgi.ebay.com/Acer-Aspire-1700-1710-lcd-inverter_W0QQitemZ150404836278QQcmdZViewItemQQptZUK_Computing_LaptopAccess_RL?hash=item2304d3abb6

search this massive thread and you will find instructions on fitting the inverter.

http://www.notebookforums.com/thread19756.html

Cheers


Oct 05, 2009 | Acer Aspire 1710 Notebook

2 Answers

I need the schematic of the d9t so I can replace Inverter board


Try this link:

http://www.givemefile.net/smanuals/notebooks/alienware/area-51m_7700.html

Aug 05, 2009 | PC Laptops

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