Question about HP Pavilion dv9000z Notebook

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Gr dv900 i have verticle lines on my lcd....what is reason behind?i try lot to update graphics driver bt fail....what should i do

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It\'s a hardware problem, Khizar, not a software problem.....

Problem is;
A) Graphics chipset
B) Video Cable
C) screen Inverter
(-> IF USED. Do NOT know if your Backlight source is LED, or CCFL. Cold Cathode Fluorescent Lamp. BOTH, are an option, )

D) LCD screen

Method is to diagnose, and see what the problem is

1) Graphics chipset:
Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port; on the laptop.
(Left side towards the Rear)

This is a general example of a VGA connector (port), and VGA Cable,

Scroll down for VGA Cable example.
You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

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

You have at least 3 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 F4 key.
The F4 key is the Display Toggle-Over key.

No display on external VGA monitor?
Hold the Fn key down again, and tap once more on the F4 key.

Good display on External VGA monitor, means the graphics chipset is OK.
Means the problem is the Video Cable, or screen Inverter (IF used), or LCD screen.

However there is an inherent problem, with the Pavilion dv9000 series of Notebook PC\'s.
The cooling for the graphics chipset is inadequate.
The surface area of the small metal plate, that is part of the Cooling Tube; is too small.

Here is a look at the cooling system. Cooling Tube and finned Heatsink, and Fan Assembly,

Set your mouse cursor in the middle of the photo. Do Not click at this time. Setting your mouse cursor in the middle of the photo, engages the Zoom In feature.

At the Top in that rectangular shaped aluminum shroud, is the Fan. Small black multi-bladed fan. The entire rectangular shape, is known as the Fan Assembly.

Coming away from the rectangular Fan Assembly, look at the small rectangular shaped copper plate.
That little bitty plate sits on the graphics chipset. It is TOO SMALL in surface area.
Coming down further you will see another small rectangular plate area. Has 4 \'arms\' in an X-shaped pattern, surrounding it.
This small plate area sits on the Processor (CPU)

Post back in a Comment, as to;
A) Does it state LED backlight on your laptop? Usually on the Palm Rest Cover, if so.
If not, then it uses CCFL backlighting.
[Light Emitting Diode
Cold Cathode Fluorescent Lamp]

Also post if the display is okay on the external VGA monitor.
If so we will go to diagnosing the Video Cable.
Often this is the problem. Either the connection at the motherboard is loose, or the LCD screen is loose; or the Video Cable has been damaged. (Stretched/Broken wires)

Connections have to be PHYSICALLY checked. Have to see if you can plug them in tighter. If this brings no joy, then Video Cable is removed, and a continuity test is performed.

Video Cable MUST be ruled out, before going on.
If NOT, you MAY buy a screen Inverter (IF used), and an expensive LCD screen; only to find out the problem was a $9 Video Cable all along.

After you post the above information I asked for, we\'ll go on........


Posted on Apr 25, 2013

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