Replace led backlight inverter on sony vauioi notebook

The 6-time blink code for the Sony KE-42TS2U indicates a backlight error. This may be due to a faulty backlight inverter board, or a problem with the power supply to the backlight inverter board. It is recommended to have the TV serviced by a qualified technician to diagnose and repair the issue.

Sony 4 blink code means either the backlight inverter board is bad or one of the backlights in the LCD panel has failed. It can also be the LD board or main logic board, check inverter board wires for arcing to ground.

HP Support > HP 450 Notebook PC > Manuals downlaod page >

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=135&prodSeriesId=5224999

Scroll down to the subheading - User Guide
Click on the appropriate Windows operating system you are using,
Windows 7, or Windows 8.

Both User Guides are PDF files.
The computer you are using now has Adobe Reader on it, which uses PDF files.
Allow the PDF file to download all the way.

Then go to the Top Left corner, and hover your mouse cursor on it.
You will see > Toggle Sidebar < will briefly appear.
Left-click on Toggle Sidebar

There will now be two icons;
Show Thumbnails on the left, and Show Document Outline on the right.......
Click on > Show Document Outline.

Scroll down the list. Click on the subheading >
Using the action keys.
(The Action keys are the F keys at the top of the Keyboard.
F1 through F12)

Here we see you hold down on the Fn key, (Bottom of Keyboard, second key from Left); and AT THE SAME TIME, tap on the F3 key. The F3 key is the Increase Brightness key.

Does not work?
Then you have a problem with the Backlight, in the LCD screen.

A primer before I go on........

An LCD screen does not produce light. It 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)

A CCFL is a Cold Cathode Fluorescent Lamp. (Bulb)
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.

CCFL backlighting uses a Screen Inverter.
LED backlighting GENERALLY does not use a screen Inverter.
(First models with LED backlighting seemed to use a screen Inverter. Newer models do not)

Your HP 450 Notebook PC uses LED backlighting.
Here we can see an LCD screen replacement example,

https://www.laptopscreen.com/English/model/HP-Compaq/HP~3115m~E-450/

NOTE -> Backlight type: LED
It does NOT use a screen Inverter.
How do I know? I'm looking at the Service Manual right now.
(I use two monitor screens)

You can also look at the Service Manual. It's Free, and available in the Manuals download page where you started.

On the Manuals download page, scroll down to the subheading >
Service and maintenance information.
Click on the blue >
HP 450 Notebook PC and HP 455 Notebook PC - Maintenance and Service Guide (26 Apr 2013)

Page 31 - Display assembly subcomponents

The LED backlighting is built into the LCD screen.
To replace the backlight, you replace the LCD screen.
Need step by step guidance with this, please post back in a Comment.
IT'S EASY.

Hello from the USA.
Regards,
joecoolvette

1) Wrong LCD screen

2) Video Cable (LCD Cable) is not connected tightly.
Motherboard side, or LCD screen side; or both.

3) IF, a screen Inverter is used, the small cable from the Video Cable, that connects to the screen Inverter; is not connected, or has a loose connection to it. (screen Inverter)

4) An LCD screen, and a screen Inverter are a Matched unit.
If it's the wrong LCD screen......................?

5) IF, a screen Inverter is used; the diagnosis was wrong, and the LCD screen was replaced.
90 PERCENT of the time, the fault is a bad screen Inverter.

A) Laptop's LCD screen uses a CCFL, (Or more than one), for a Backlight; the laptop uses a screen Inverter.

Diagnostic flowchart leads from Graphics Chipset, to Video Cable, to screen Inverter, THEN, LCD screen.
Expensive LCD screen was replaced, instead of the actual part that needed replacing;
Video Cable: $9 to $22
Screen Inverter: $9 to $22

LCD screen: $60 to $245

B) Laptop's LCD screen uses LED backlighting, and does NOT use a screen Inverter:

Diagnostic flowchart is;
A) Video Cable;
A Video Cable should have it's connections PHYSICALLY checked.
You have to try to push the connectors in tighter.
Visual inspection alone will NOT do.

Making sure the Video Cable connections are tight, and this does not fix the problem, then the Video Cable needs to be removed; and every wire in the Video Cable checked for Continuity with a multimeter set to OHM's. (1K)

Not feasible, then take the Video Cable down to the nearest small computer shop; and have the resident tech check it for Continuity.
Should only be a few bucks.

Or just replace the Video Cable.
(Parts changing I know, but...........?)

Primer:
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 more than one), or a series of LED's.
(Light Emitting Diode)

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

Average thickness is 2mm. That is a little large than 1/16th of an Inch.
Average thickness is almost as long, as the LCD screen is in height.
View the last 8 photos,

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

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

As previously stated, Backlighting that uses CCFL, uses a screen Inverter.
LED backlighting MAY, or MAY NOT use a screen Inverter.
When the LED backlight technology first came out, it seems some did use a screen Inverter.
It also seems as the technology advanced, LED backlighting does Not use a screen Inverter.

Regards,
joecoolvette

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

Yeah, so what's the problem?



Ya got plenty of flashlight batteries?



OH I'M JUST KIDDIN'!



A) It isn't a laptop

B) It is an All-In-One Desktop PC

VGC-JS110/J?

The VGC-JS designator is what states it's an All-In-One.

Have no idea what THAT model number you typed is, though.

Believe your problem is the screen Inverter, not Backlight itself.

Small primer;

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 two of them), or a series of LED's.
(Light Emitting Diode)

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.
Length is almost as long, as the LCD screen is in height.

Notebook PC (laptop) example,

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

View the last 8 photos.

A screen Inverter converts the power from the computer, for the LCD screen, and Backlight.
Computers using LED's as a Backlight, do not use a screen Inverter.

[See how long, and thin a CCFL backlight is? It is also filled with poisonous Mercury, just like the large Fluorescent light bulbs.
It is better to have a pro replace a CCFL backlight; or you, or pro replace the entire LCD screen; than it is to risk getting cut by a broken CCFL bulb, and getting Mercury poisoning ]

Your problem should be the screen Inverter.

The screen Inverter is a small rectangular circuit board, and is usually mounted to the bottom of the LCD Screen Frame.
Usually. This is an All-In-One, so it could be mounted at top, or side.

http://www.youtube.com/watch?v=d0oO2DCkbHE

http://pressf1.pcworld.co.nz/showthread.php?112060-disassembling-a-Sony-All-in-one-computer&s=bcc31180d7dd2d2880df25306db85a61

larryccf1 - 23/08/2010 04:40 AM

(DANGEROUS using steel putty knifes! I suggest a Spudger Tool to start with, then use plastic thick guitar picks to space open.

At ANY rate, do not go deeper than 3/8ths of an Inch. You may run into wires, etc. The plastic Latches they are trying to refer to; have 1/4 Inch long 'hooks'. (They are essentially L-shaped Latches )

Use the manufacturer ID, and part number, on the screen Inverter; to find replacement on the internet; or post it back here in a Comment, and I'll look.

Basic example of a laptop screen Inverter. It's gonna look pretty close to the same,

http://www.amazon.com/Sony-Vaio-Lcd-Inverter-Unit/dp/B001DFCH0C

The 'pits' of all of this; is that you have to disassemble from the Back, going towards the Front.
Display Bezel does not come off from the front, IMHO.

Means everything needs to be removed, to access the screws on the inside, which hold the Display Bezel. Then Display Bezel can be removed from front, and screen Inverter accessed.

For additional questions please post in a Comment.
Regards,
joecoolvette

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

Here are the eBay search results for your exact system model -

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=Toshiba+Satellite+L355D-S7809+screen&_sacat=0

It is the screen Inverter, or the LCD screen itself.

Screen Inverter: A small circuit board located behind the Display Bezel, and mounted towards the bottom of the LCD screen,

http://support.dell.com/support/edocs/systems/vosA860/en/sm/display.htm#wp1183775

The yellowish long object, at the bottom, is the screen Inverter.

Here is another look at it,

http://www.batterycenturys.com/dell-vostro-a860-inverter-p-185294.html

Dell Support > Vostro a860 Notebook PC > Service Manual,

http://support.dell.com/support/edocs/systems/vosA860/en/sm/index.htm

In the list clicking on -> Display, will get you to the first link above.

Need guidance in replacing the screen Inverter, post in a Comment.

(Just a basic guide using a Vostro 1014/1015 Notebook PC. Not yours, but good for basic guidance. This is replacing the LCD screen,

http://www.insidemylaptop.com/replace-lcd-screen-dell-vostro-1015-1014-laptop/ )

[ Primer:
An LCD screen cannot produce light by itself,

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

( Click on the small window with the monitor in it )

It 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 used as lights.

The Dell Vostro a860 Notebook PC uses one CCFL, for a Backlight, OR there are Vostro a860's that use LED lights.
(If you replace the LCD screen, make sure FIRST of what type of Backlighting it uses)

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 of a CCFL 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 ]

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

Most of the time the fault is the screen Inverter.

The Vostro a860 Notebook PC's, that uses LED's as a Backlight, MAY also use a screen Inverter.

Primer over.

For your problem it could be the screen Inverter, but I lean more towards the LCD screen itself, is the problem.

How to test a screen Inverter? Requires a very sensitive multimeter.
Read; Expensive,

http://www.fonerbooks.com/test.htm

For a layman who does not have access to a sensitive multimeter, the method is to just replace the screen Inverter, and see if it is the problem.
'Parts changing', I know, but if you do not have the proper equipment to test with?

Screen Inverter replaced, and problem still persists, replace the LCD screen,

http://www.laptopscreen.com/English/model/Dell/VOSTRO~A860/

For additional questions please post in a Comment.
Regards,
joecoolvette

Hello Frank,

This is Romeet, id like to try and help you.Most Sony's have a small circuit at the front end of the LCD that effectively works like an Inverter Circuit.How good are you at opening these things up? any electronic repair centre near you? has to be a problem with the fusible resistor or inductor on the circuit i mentioned ( as mostly seen in my experience ).Please let me know.

B.Regds
Romeet