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How to replace CCFL backlight bulb in M220z1L01 Monitor

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  • Bud Martin
    Bud Martin Dec 30, 2010

    Are you sure that the lamp assemblies are bad? To get the lamp assemblies out you will have to do complete tear down of the panel to get the lamp assemblies out since they are taped down inside the panel. Very fragile process and need to be done in the dust free environment.
    Raw lamps: www.lcdparts.net

    Basic LCD monitor and TV troubleshooting guide:http://www.fixya.com/support/r6150077-ba...http://www.fixya.com/support/r5093881-lc...http://www.fixya.com/support/r7406380-tv...
    Failed TV and Monitors:http://s807.photobucket.com/albums/yy352...
    Learn about bad caps:http://en.wikipedia.org/wiki/Capacitor_p...
    Capacitors kit:http://lcdalternatives.auctivacommerce.c... he can make you a set of caps for you.
    Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

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6 Suggested Answers

6ya6ya
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Hi,
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SOURCE: Envision 17" LCD display will not stay on

Seems the N-Channel MOSFET switch in the power supply is the culprit. NTE does not list a replacement part for this, so a sub is necessary (any N-Channel 600V MOSFET in same TO220F case should suffice). I have to look one up for mine.

Posted on Mar 25, 2009

budmrtn
  • 11361 Answers

SOURCE: My LG l222wt CCFL backlighting as failed. I'm

Replacing the lamp assemblies is the last resort and you have to do very delicate disassmble or soldering works, see my albums.
Please read below:
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Posted on Oct 27, 2010

  • 1684 Answers

SOURCE: LG L1960TR CCFL/Backlight Part No.'s or CCFL bulb specs.

You can get the replacement tubes here:

http://www.ccflwarehouse.com/lampfinder.html

Posted on Jun 24, 2012

  • 189 Answers

SOURCE: I need a replacement screen and i'm not sure which cffl/backlight to order

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

Posted on Sep 21, 2012

joecoolvette
  • 5660 Answers

SOURCE: how to replace a ccfl backlight bulb on presario cq60-419wm

Whoa!

Let's talk for a minute..........

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. That is a little thicker than 1/16th of an Inch.
Or about the width of this capital -> O <-

Average length is almost as long, as the LCD screen is in height.

Just like it's larger 'cousins', it has Mercury in it. A POISON.

Point?
They break VERY easily, and have Mercury inside.

I usually suggest changing the LCD screen itself, to replace a Backlight.

More expensive?
YES
If you are talking about price of LCD screen compared to a CCFL bulb.

SAFER?
YES
There is NO price for a human life.


Okay, moving on..................

1) http://www.insidemylaptop.com/replace-lcd-screen-hp-g62-compaq-presario-cq62-laptop/

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

3) Service Manual:

HP Support > Compaq Presario CQ60-419wm Notebook PC >
Manuals download page, (User Guides)

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=3966262&

Scroll down, click on the blue -

Compaq Presario CQ60 Notebook PC HP G60 Notebook PC - Maintenance and Service Guide

[Ignore if you are aware;
This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.

After you click on the above file name it may take up to 30 seconds, before the first page comes up.

(The PDF file will not show until fully downloaded )

Go to the top left corner, and click on the small square icon -
Toggle Slider.
Becomes two small square icons.
Show Thumbnails on the left, Show Document Outline on the right.
Click on Show Document Outline to see the Bookmarks menu.

The Zoom In icon ( + ) at the Top, increases the view size when you click on it.
The Zoom Our icon ( - ) decreases the view size.

When I refer to a page number, it is for the Adobe Reader page number box at the Top. (To the right of the Down Arrow) ]

The plastic frame in front of the LCD screen is the Display Bezel.

I may be wrong, but I believe the Display Bezel can be removed, WITHOUT having to remove the entire Display Assembly from the laptop.

Makes life a lot easier.

There is a Philips head screw in the Bottom/Left corner, and a Philips head screw in the Bottom/Right corner, to remove from the Display Bezel.

They are under Screw Covers. The Screw Covers are made of synthetic rubber, or plastic. They are held in place by a type of rubber cement.
I take a computer pick, and gently pry up at the base of the Screw Cover.

If you are careful you should be able to reuse the Screw Covers.
If they do not stick anymore, apply a TINY dab of rubber cement to them, with a toothpick.

The Display Bezel has TABS going around the exterior perimeter of it's inside edges.
These snap into matching LATCHES on the Display Cover.

There also may be some sticky tape, at the bottom/inside edge of the Display Bezel. Means CAREFULLY pry the bottom edge of the Display Bezel when removing.

The best method, of removal of the Display Bezel that I have found, is to flex it.
It is made of space-age plastic, and is pretty tough stuff.
(Of course there are those, who could destroy a steel ball bearing with a rubber mallet, in a sandbox)

I cut a piece of thick construction paper, to just fit the inside edges of the Display Bezel.
Display Assembly laid as far back as possible, the thick piece of construction paper will stay in place.
It is used to prevent scratching of the LCD screen, from your fingernails.

Come to the Inside edge (LCD screen side), of the right/middle side of the Display Bezel. Sliding a fingertip of one hand under the bezel to lift up slightly.
Can't get in? Move over a little. You are at a Tab/Latch.

With one fingertip under the bezel, slide another fingertip under from your other hand. By now a Tab/Latch should have released.

SNAP!

Sounds like you're breaking something.

Keeping the bezel slightly up, move along with the fingertips of one hand, and move towards the Top.
Go along the Top popping Tabs/Latches loose.
Then come down the Left side.

As you reach the bottom ease up on one side a little, and wait for the tape to start releasing. Then ease along the bottom until all the tape releases, and the Display Bezel pops off.

Once the Display Bezel is removed, then disconnect the small cable that comes from the Video Cable (Display Cable - HP), TO the screen Inverter board. (Left side of screen Inverter)

(screen Inverter is mounted behind the Display Bezel, and at the bottom of the Screen Frame.
The Screen Frame is the thin metal frame which surrounds the LCD screen assembly)

[The LCD screen is an assembly of layers. The layers are held in the factory set position by the Screen Frame]

Disconnect the small cable that goes TO the screen Inverter, on the Right side of the screen Inverter.
Remove the screen Inverter, and lay aside.

Remove the Philips head screw at EACH top corner. Holds the Screen Frame TO the Display Cover.

Tilt the top of the LCD screen towards you, remove the clear adhesive tape over the Video Cable connector on the back of the LCD screen.

(DO NOT remove the tape all the way. Just carefully peel it back far enough, so that you can get to the Video cable connector, at the back of the LCD screen. This way you should be able to reuse the tape)

Disconnect the Video Cable (Display Cable) from the back of the LCD screen.

Remove JUST the screws which hold the Hinge Brackets TO the Screen Frame.

The Screen Frame can be taken apart. Of course you will need to do this, BUT ONLY after removing the LCD screen assembly.

THREE screws on each side for the Hinge Brackets.
(Display Panel Brackets)
One towards the Top, two down towards the Bottom.

Pages 64 through 80 in Service Manual.

Page 66/ Bottom; shows the Screw Covers, and Screws to remove from Display Bezel.
Page 68/ Bottom; shows disconnecting the screen Inverter.

Page 69 shows screws to remove in order to remove LCD screen.
(Display Panel)

Page 69/ Bottom shows screws to remove for removing Hinge Brackets.
(Display Panel Brackets)

Pages 128 through 133 - Recycling/Display: shows taking the Screen Frame apart, and accessing Backlight.

For additional questions please post in a Comment.

Regards,
joecoolvette

(WEAR gloves -> BE SAFE)

Posted on Feb 25, 2013

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VIZIO REPLACEMENT PANEL


You are a brave man for taking apart your panel. It's most likely the bulb is failing. Failing CCFL bulbs draw more current when they age which could explain the melting holder. They also tend to give off a pinkish glow when they are at the end of their life cycle. I'm not one to guess, I like to verify before replacing. There are testers for CCFL but not worth investing the money for a one time deal. I usually keep the boards attached to the back of the panel. Remove the LCD panel and prism materials to expose the backlights. I then turn on the set and monitor the lamps, checking for any that are giving off a pinkish tint, The bulb could be your problem or just one of your problems. As I stated earlier, aging backlights draw more current than normal, this can cause failure in your inverter(s) boards.

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I need a replacement screen and i'm not sure which cffl/backlight to order


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

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Hi,

The CCFL backlight bulb is on its way out. You can either purchase a new buld for the laptop screen or replace the whole screen itself.

If you just want to replace the bulb itself then click on the link provided below.







http://www.insidemylaptop.com/replace-ccfl-backlight-bulb-in-laptop-screen/








Regards.

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You may have a defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site :-
www.lcdparts.net

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You may have a faulty inverter or a faulty CCFL lamp.

A defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net

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You could have a faulty inverter or a CCFL lamp, To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

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1 Answer

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Defective CCFL backlight may has the following symptom:
  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp)
has reached the end of the life and all you need to do is replacing the CCFL lamp


Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

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Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net

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