Question about HP Pavilion dv9000z Notebook

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Single or dual backlight

I need to order parts for my laptop and for that I need to know if it have a single or a dual backlight display... how can I know it?

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The 17 in SXGA + TFT is single
the 17 in WXGA + TFT is dual ...

you can look up your parts at the HP part finder ...
http://partsurfer.hp.com/cgi-bin/spi/main

Posted on Mar 12, 2008

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Upper sise of screen flickering problem


Technology b> A laptop's display assembly consists of an LCD panel, an inverter board and a backlight lamp. The inverter board supplies power to the lamp which lights up the LCD screen as it generates images. Light from the lamp is then uniformly distributed over the panel to create images. b> Cause b> Flickering is commonly caused by a damaged or malfunctioning inverter. Because a faulty inverter is not able to supply adequate power to the backlight lamp, the screen goes dim each time the backlight loses power. In some cases, flickering may also be caused by a faulty connection between the inverter and backlight lamp. Diagnosis b> Resolving a laptop screen's flickering problem entails correctly diagnosing the problem and replacing the faulty component. You may diagnose the problem by hooking up the laptop to an external display unit, such as a projector. If the external display has the same display problem as the laptop's LCD screen, it is indicative of a motherboard or video card problem. If the external unit displays bright, crisp images, the problem is probably caused by the backlight or inverter. b> Solution b> You may repair a laptop screen's flickering problem by replacing the inverter board or backlight. Order parts from a trusted supplier and replace the component by referring to your product documentation.
http://www.tech-faq.com/how-to-repair-a-laptop-screen.html http://www.laptop-repair.info/laptop_screen_repair.html b> Hope this helps.

Jan 21, 2013 | Lenovo IdeaPad S300 59359327 Silver Gray...

1 Answer

Where is the backlight resolution located on series 442 e machine laptop


The backlight is built into the LCD screen located on the bottom, the new display will include the backlight.

Jul 06, 2012 | eMachines PC Laptops

1 Answer

Im a user of Laptop nc6230 for long time , not i found a problem with my laptop. Same time when i switched on the laptop, i can hear everything sound,fan but the screen remain blank. And some time it...


@rashid386

If you turn the computer ON and you can hear that something's running on the background but there's no display , this is a sign that the screen's FL Inverter (this is the chip that controls the backlight of your LCD) or the LCD screen itself is already wearing out and needs to be replaced. If you can see a background image but there's no backlight - you need to have the FL Inverter replaced. If the screen is all black, you may need to have the LCD screen replaced. If you know your way around the computer, you could order screen replacement here and disassembly guide here.


Good luck.

Sep 11, 2011 | HP Compaq nc6230 Notebook

1 Answer

I have an HP HDX 16-1025nr. My LCD got broke and I got a new one.Does anyone know if I can convert the dual lamp lcd to a single lamp? Im pretty proficiant at fixing desktops, but have very little laptop...


Hello Darrel,

Since you promise to repay with advice 10 fold....

Here are some issues you are going to face by changing from a dual lamp backlight to a single lamp.

1) The inverter is designed to drive 2 lamps. You will need to change the inverter as well, or make sure it is compatible with driving a single lamp.

2) Your display was designed for 2 lights originally, this is likely the only way that they were able to get reasonable brightness evenly over the display.

Until you get some more experience working on laptops, just stick to what should be there. As your skills improve, then you can start modifying.

I am guessing that you have discovered the cost difference between single and dual lamp LCDs panels. Bear in mind that those are for the assembly itself. Pull everything out, drop in an assembly. There are a few sources that sell just the LCD itself, and you will have to remove the back light assembly off the original. Again, your skills may not be up to this.

$400 sounds appropriate from HP, but a quick check over at screentekinc.com and sparepartswarehouse.com, though the latter doesn't feature your part#.

Also, here is a decent run through on how to do it:
www.screentekinc.com/lcd-removal-instructions.shtml

Sep 21, 2010 | HP HDX PC Notebook

2 Answers

I have an HP Pavillion DV4 laptop, when turned on the screen displays nothing. Ive been using my laptop by means of an external monitor.


You might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Sep 17, 2010 | HP Pavilion dv4000 Notebook

1 Answer

Back light or inverter. my screen is black.


If you see a very dim image or black screen or flicking image on the LCD screen it means you have a backlight problem.

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.

Mar 28, 2009 | Dell Inspiron 8600 Notebook

2 Answers

New laptop lcd display not working


check the panel to make sure the panels are the same model number there are more then one part number for gateway lcds for your model and if your laptop uses the xga screen and your not replacing with the correct panel then you will get the problem you are seeing now.even thought the inverter and back light are the same the panel are very differant.

Feb 18, 2009 | Gateway MT6451 Notebook

1 Answer

My Gateway laptop screen is dark and I believe I have to replace the bulb but how do I know which one to order? I have pulled apart the monitor but where to go from here? Thanks Dee


Just Search up the Make & Model Backlight Bulb of the LCD Screen. Example: (LiteOn LTR6543 Backlight Bulb). Don't forget about the Inverter, Most of the time it's Mounted below the LCD Display. That's what Powers the Backlight. Hope This Helps!...

Jan 31, 2009 | Dell Latitude D630 Notebook

2 Answers

Dell Vostro 1710 display problem


Hello My Dell Vostro Laptop Display Not Working Correctly it showing Dim but in other desktop when i connect to the Laptop Of Mine it showing Correctly With No Dim Problems? How can I fix the Problem?

Nov 19, 2008 | Dell Vostro 1500 Notebook

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