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Dv9000 backlight appears, but no display except to monitor via external VGA port

I HAVE HP PAVILION DV 9000 LAPTOP , WHEN I SWICHED ON MY LAPTOP IS ON BUT SCREEN IS NOT WORKING AND EVERY ONE MINUTER LAPTOP GETS AUTOMATICALY RESET. SO PLEASE GIVE ME REPLY WHAT IS THE PROBLEM? I have a similar problem, but I don't think solution 2 will solve. I will try it, though. I think it won't work because my backlight comes up, but just won't display the output. I close the lid mostly, and I can see the backlight turn off. Back on when I open it. I'll try solution 2 and let you know. My next step is to open the case and look at the connections.

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Gr dv900


Display problems are among the most common difficulties people have when upgrading either Windows or their computers. Here are solutions to some common display problems.
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Apr 25, 2013 | HP Pavilion dv9000z Notebook

2 Answers

My laptop screen is not coming on it is receiving power but still not coming on


Timothy, post the laptop manufacturer, and the laptop's model number. It's on the bottom of the laptop, Usually in a sticker, or white Service Tag.
This way I can guide you in more detail. Post back in a Comment.

A) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA connector, on the laptop.

This is an example of a VGA Cable, and VGA connector,

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

Could be on one of the sides of the laptop, or the back of the laptop.
You can use a CRT monitor, (Looks like a small TV), or a flat LCD screen monitor, that has a VGA cable attached.

B) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By default the display should show on the external VGA monitor.
IF not;

There are at least three display options available:
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key, and at the same time tap once on the Display Toggle-Over key.
Which one is it? Dunno. You didn't state what laptop manufacturer, and model number.

It is one of the F1 through F12 keys. Most of the time the F4, or F5, or F7 key. Has a monitor symbol on it, and sometimes a side arrow.

No display on external monitor still?
Hold the Fn key down again, and at the same time tap once more on the Display Toggle-Over key.

If the display still does not show on the external VGA monitor, you have a bad graphics chipset on the motherboard. Usually means motherboard replacement.
(There are problems with HP Pavilion dv2000 series, Pavilion dv6000 series, and Pavilion dv9000 series, in this area. There are other model series of laptops also, not just HP. There is a solution besides motherboard replacement)

C) IF, the display shows on the external VGA monitor, you have a problem with the Video Cable, or inside the Display Assembly.

I can help you find it, just need the laptop manufacturer name, and Model Number.
Post back in a Comment.

Regards,
joecoolvette

May 28, 2012 | Computers & Internet

1 Answer

Keyboard lights up screen stays black....after inserting recovery disk screen still remains black...


Would like you to attach an external monitor for a diagnoses.

A VGA monitor.
Can be a CRT monitor that resembles a small TV, or a flat LCD screen monitor, that has a VGA cable attached,

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

1) Laptop OFF, monitor OFF, attach the VGA cable of the monitor to the laptop's VGA connector.

[For the HP Pavilion dv6000z Notebook PC, the VGA connector is on the Left side at the Rear. Second port from the rear. 15 pins.
3 rows of 5]

2) Turn the monitor on. If a CRT style allow it to warm up.
3) Turn the laptop on.

By default the display should show on the external VGA monitor.

If not, press, and hold down on the FN key,
(Second key from the left, on the Bottom row on the Keyboard),
and tap on the F4 key.
(Top of Keyboard towards the left)

Still no? Hold the Fn key down again, and at the same time tap on the F4 key.

There are 3 display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

IF, the display shows up on the external monitor, and if it is OK, the problem lies in the Display Assembly, and/or the Video Cable.

More on that in a moment.

IF, the display does Not show up on the external monitor, or if it is garbled, the graphics chipset is bad.

HOWEVER, there is a problem with the graphics chipset, for the dv6000 series of HP Pavilion Notebook PC's.
More specifically it isn't actually the graphics chipset itself, but the mounting of the graphics chipset to the motherboard.
More on this in a moment.

External VGA monitor shows a good display;
Video Cable:
The video cable is checked for apparent damage first, and at the same time, see if it's connectors are tightly plugged in.

On one end, the video cable is plugged into the motherboard.

(ALL power removed, AC adapter { Charger} and Battery, the Switch Cover is removed, and the Keyboard, far enough to lay it back out of the way. Keyboard Cable still attached to motherboard. The Display Cable is the one to the Far left, right under the left side of the LCD screen. The cable next to it, to the immediate right, is the Microphone Cable )

The video cable routed from the connection on the motherboard, up under the left Hinge Cover, and into the Display Assembly, where it then attaches to the Back of the LCD screen.

THIS connection must be checked also.

{ Just gave advice similar to this earlier. The asker's problem turned out to be a loose video cable connection, on the back of the LCD screen }

Examine the sheath of the video cable. See if there are signs of damage. If so the tiny wires inside the cable could be damaged.
Apparent damage or not, you may want to remove the video cable, and perform a continuity check with a multimeter. (Ohm's. Check each wire in the cable)

Video Cable connections prove to be tight, video cable continuity check proves video cable is OK, move on to the screen Inverter.

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 a series of LED lights.

The Backlight is a CCFL for an HP Pavilion dv6000z Notebook PC.
[It is 2mm Wide, and 334mm Long. Or a little thicker than 1/16th inch Wide, and a little over 13 inches Long ]

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

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

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

Example of a screen Inverter for a Pavilion dv6000z Notebook PC,

http://www.nylaptopparts.com/index.php?main_page=product_info&products_id=560

The thin plastic frame that surrounds the LCD screen, and is in front of the LCD screen, (Resembles a picture frame), is the Display Bezel.
The screen Inverter is located behind the Display Bezel, and at the bottom of the LCD screen area.

http://www.insidemylaptop.com/remove-replace-lcd-screen-inverter-hp-pavilion-dv6000-laptop/

http://www.insidemylaptop.com/take-apart-hp-pavilion-dv6000-laptop/

External VGA monitor does NOT show a good display, it is a graphics chipset mounting issue, more to follow.
Regards,
joecoolvette

Jan 15, 2012 | HP Pavilion dv6000z Notebook

1 Answer

I have HP DV9000 laptop when i switch on it powers but the display is like in safe mood i cant see anything


i am mr john uche aaron
in Nigeria ,
my hp pavilion dv 9000
cannot bootup
but display only light on the quick bar
and blank screen
what is the solution

Dec 12, 2010 | HP Pavilion dv9000 Motherboard

1 Answer

I have a hp laptop. was on line and screen went black. and will not show again. it strats up sounds but black screen.what do i do


1) Do you have a VGA monitor that you can use for an external monitor?
{VGA monitor is also referred to as a CRT monitor. Looks like a small TV}

The back of the laptop, or side, has a VGA port. The VGA monitor is plugged into it.
{Laptop off}
Then the VGA monitor is turned on, and allowed to 'come to life'.

Now turn on the laptop. Press the Fn key down on the keyboard, and hold it down.
Now press the Monitor toggle over key.
Since you did not state the HP laptop Model Name, and Model Number, I can only give you generic guidance on this.

The monitor toggle over key has a monitor screen symbol on it. It will be one of the F keys.

(It's an External Monitor toggle key.
Press it one time and the display toggles over to an external monitor.
Press it again, and both the laptop LCD screen, and the external monitor have a display on them.
Press it once more, and the display goes back to the laptop's LCD screen )

If display shows up on the external monitor, you have a problem with the display of the laptop.

Primer:
An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is used as an additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp {Bulb}
Similar to the fluorescent lighting used in homes and businesses, but on a MUCH smaller scale.

{Average Backlight is 3 to 5 inches long, and half the diameter of a No.2 pencil.
The Backlight is located on one edge of the LCD screen}

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

90 percent of the time the problem is the Inverter.

Inverters are relatively cheap, and if I knew the Model Name, and Model Number of your HP laptop, I could give you a link to HP Support where you could download the Service Manual for free.

This way you would have a manual to show, and detail how to replace the Inverter, and I could guide you.

I could also give links for your perusal for Inverters.

There is one more thing however.

HP Pavilion DV2000, DV6000, and DV9000 series laptops, have a graphics chip overheating problem.
The laptop comes on, the blue indicator LED lights light up, but the LCD screen is black.

This video explains why, shows a solution to fixing the problem, and details out a lot more than I am privileged to state here,

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

Have further questions regarding any of the above, please state in a Comment.
(Believe upper right of your page)

Regards,
joecoolvette

Dec 02, 2010 | Computers & Internet

1 Answer

My hp pavilion dv9000 goes to black screen


check the display on external monitor through the vga port if its not there then the problem is on the motherboard, take it to the service centre

Sep 21, 2009 | HP Pavilion dv9000z Notebook

2 Answers

HAVE HP PAVILION DV 9000 LAPTOP , WHEN I SWICHED ON MY LAPTOP IS ON BUT SCREEN IS NOT WORKING AND EVERY ONE MINUTER LAPTOP GETS AUTOMATICALY RESET. SO PLEASE GIVE ME REPLY WHAT IS THE PROBLEM?


hmmm... i had a simmiliar problem wt my laptop...not sure about this but in my case it was a motherboard issue... my motherboard got fried.... this is an extreme case... it could also just be a fault wt ur RAM...your laptop isnt able to start booting...

May 30, 2009 | HP Pavilion dv9000t Notebook

1 Answer

Screen has backlight, but no display


Check the video cable that connects the LCD screen to the motherboard. Reseat the cable.

Apr 07, 2009 | HP Pavilion dv9000z Notebook

1 Answer

Hp pavilion dv2000 notebook will not boot up


Go to this Hp website for you could have a grapgics chip fault. One way to test is to plug a VGA monitor into the VGA outlet port on the upper left side of you laptop and start it up. If you get a clear display you have a screen problem - next step remove the external monitor and again boot up but in a darkened room to see if your backlight is off - if you can just see the HP logo in the back ground then your backlight has failed or more rightly - the backlight micro switch under your R/H hinge has failed. A cheap fix. If there is no display external or TFT your Nvidia graphics chip has failed. m/board replacement required BUT you may qualify for free m/board replacement under Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} HP Pavilion dv2000/dv6000/dv9000 and Compaq Presario v3000/v6000 Series Notebook PCs - HP Limited Warranty Service Enhancement go to this site below to see if you qualify
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01087277&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN

Mar 07, 2009 | HP Pavilion dv2000t Notebook

1 Answer

HP dv9000


 Hello jarkk, I believe your problem is with your backlight inverter. the hard drive should be installed for this process of checking it on an external monitor. with the hard drive removed it will not boot to the operating system. with the drive in, use the external monitor. if the monitor works when plugged into the external monitor plug, this will eliminate a bad video card. if the screen is still black on the laptop screen, replace your backlight inverter. the last case cenario is to make sure your backlights are not burnt out. 

Sep 11, 2008 | HP Pavilion dv9000z Notebook

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