Question about HP Pavilion ze2000 Notebook

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Visual problem there is a 2mm thick line goin through my diaplay, Horizontally from the bottom of the screen.

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The line you see can be because of faulty LCD or faulty Graphic Card.
To make sure what is the actual cause of the issue, try the steps listed below for which you need a desktop monitor.
Turn on the Notebook and connect the Desktop Monitor the VGA Port of the Notebook and turn it on.
Now, hold the FN key and press the F4 key once to toggle the display between the LCD and the Desktop Monitor connected.
If you see the line on the Desktop monitor also, the issue is with the Graphic Card. However, if the line appears only on the LCD of the Notebook and not on the Desktop Monitor, the issue is with the LCD.
The Notebook needs to be repaired in both the situations.
However, if the issue is with the Graphic Card, the motherboard needs to be changed since the Graphic Card is soldered on to the motherboard. Additionally, if the issue is found to be with the LCD, the LCD Display  of the Notebook needs to be changed.
I recomend you to go for a new Notebook if you are not comfirtable since the Motherboard or LCD Replacement will cost you a bomb...
Hope this helps...

Posted on Sep 15, 2008

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What is the poblem of a laptop with the screen goes up and down...


1) Video Cable:

The Video Cable connects to the top of the motherboard, in an area under the Keyboard, or Switch Cover.
From there it goes under the left Hinge, and up into the Display Assembly.

Routing under the left Hinge, and normal repeated opening, and closing of the laptop, may cause the Video Cable to become pinched. This can cause loose connections, and/or damage to the Video Cable.

Average example of a Video Cable,

http://www.amazon.com/LotFancy-Notebook-Compatible-50-4AQ08-101-50-4AQ08-001/dp/B005GB9GT4

Click on the view to enlarge it.

The video cable connection may be loose at the motherboard side, and/or at the back of the LCD screen, in the Display Assembly.

Procedure for checking is to Physically, see if the connector/s is tight.
Visual inspection alone will NOT do.

The tiny wires inside the sheath of the Video Cable, may be damaged. Stretched/Broken. Could have an intermittent contact of the broken wires, and this causes a poor video signal.

2) Screen Inverter:

Primer;
An LCD screen cannot produce light by itself. 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.
Average length is almost as long, as the LCD screen is in height ]

A screen Inverter is used to convert the electricity from the laptop, for the LCD screen, and Backlight.
A laptop that uses LED's for a Backlight, most of the time does not use a screen Inverter.

Primer over.

A failing screen Inverter will show the symptoms you describe, also.

3) LCD Screen:

If the Video Cable proves to be OK, (Continuity check with multimeter, and also have an assistant gently wiggle the cable while you are checking (OHM's), to see if there is an intermittent break), and the laptop's Backlighting is LED's, then the problem is the LCD screen.

What is the laptop manufacturer name, and model number?
Model number is on the bottom of the laptop. Most of the time in a sticker. (And close to the Windows product key holographic sticker)

Post back in a Comment.

Regards,
joecoolvette

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2 Answers

Toshiba satellite backlight


Mohammad,

Toshiba Satellite P100 screen Inverter replacement;

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

(You can click on any photo to enlarge it. At the top, and bottom of the page are the page numbers. They are in white; Page1 :: Page2 :: Find another model )

2) Primer:
An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight (Present technology) is a CCFL, or a series of LED lights.
The Toshiba Satellite P100 series of Notebook PC's uses a CCFL.

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

Average size is approximately 2mm Thick, and the length is close to the height of the LCD screen. 2mm is a little larger than 1/16th of an inch.

This means the CCFL can be broken quite easily, as it is fragile. (You also DO NOT want to be cut by a Fluorescent lamp )

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

A screen Inverter converts the power from the laptop, for the Backlight, and LCD screen.

As previously stated in a Clarification, 90 PERCENT OF THE TIME the fault is the screen Inverter.

Regards,
joecoolvette

(I never request commendations, but thank you for offering.
We, the older techs here, feel that is begging.
3 years at FixYa so far.
Regards,
joecoolvette)

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