Question about HP Pavilion dv6000z Notebook

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I have a HP Pavilion dv6000 which has stopped working when i turn it on the blue lights come on and the fan starts up but only for a short while then the blue lights start to flash on and off but the screen stay's black, so i took the battery off and tried with just the mains although the fan cut's in and then off again the blue lights stay on but still the screen is black ..any ideas..?

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  • HP Master
  • 5,660 Answers

I agree with net2005.

It is a video chip issue.

Video chip;

Chip and Chipset are slang terms for I.C.
Integrated Circuit.

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

Video and graphics chip mean the same thing.
It is a GPU.
Graphics Processing Unit.

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

The GPU for the HP Pavilion dv6000 series of Notebook PC's, is an Nvidia GeForce 9200M GS

http://www.nvidia.com/object/product_geforce_9200m_gs_us.html

This GPU chipset does Not have pins on the bottom, and does Not sit in a socket on the motherboard.

The mounting of the chipset to the motherboard, is a surface mount called BGA.
Ball Grid Array.

The bottom of the chipset has solder balls for it's contact pins.

The area on the motherboard has small copper pads, which line up with the chipset's solder balls.

The chipset is set into position on the copper pads, and heat is used to melt the solder balls, and solder the chipset to the motherboard.

For cooling inside a laptop (Notebook), there is a Fan, and a Heatsink Assembly.

A Heatsink is typically a plate of metal, with tall, thin fins protruding from it.

The plate absorbs heat from whatever object it is placed against, and the fins absorb the heat from the plate.

The fins then radiate the heat away.
The fan pushes air over, and in-between the fins, and helps to carry the heat away.

For a laptop the Heatsink is often made of copper. There is a tube that is filled with Nitrogen, and connects to the Heatsink.
> Cooling Tube.

On the end away from the Heatsink on the Cooling Tube, there is a plate.
This plate sits on top of the Processor.
>Fan/Heatsink Assembly


There is also be a plate on top of the GPU chipset, connected to the Cooling Tube.

The Processor and GPU chipset are the two hottest chipsets operating inside a computer.
Laptop or Desktop.

Because there is not enough cooling provided for the GPU chipset, it becomes so hot that it partially melts the solder connections, in the BGA surface mount.

Poor connections to the GPU chipset, is what you are seeing with your laptop.

Here is a video on Youtube describing one solution to fix the problem.
It also states that there is a recall from HP.
(I would use a Heatgun instead of a torch)

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

To add:

1) With the heat involved inside a laptop the Thermal Paste often dries up.
Sometimes there was no Thermal Paste applied to the top of the GPU chipset, from the factory.

The Thermal Paste on the top of the Processor (Case), and the Thermal Paste on top of the GPU chipset, should ALWAYS be removed, and replaced when the Fan/Heatsink Assembly is removed.

Thermal Paste is cheap. It's a GOOD idea to replace it.
Need to know the CORRECT procedure, please state in a Comment.

2) ALWAYS follow Anti-Static Precautions when working on a laptop.

Suggest you buy, and wear an ESD wrist strap, and connect the alligator clip to a good ground source

3) Use a multi-compartment container for the various screws you will remove.
Mark each compartment for the area the screws come out of.
DO NOT mix them up!

4) Make notes and drawings as you disassemble.
It's nice to have a record to refer back to, in case you get interrupted.

Regards,
joecoolvette

Posted on Nov 24, 2010

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