Question about HP Pavilion Ze4805us Notebook

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Cooling fan and heatsink.

How do I remove and replace the cpu cooling fan with heatsink for AMD processor in a HP Pavilion ze4805us(PF175UA) Notebook PC?

Thanks for any Help.

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Re: Cooling fan and heatsink.

It's not very difficult, but a bit time consuming, you must pry under the middle, left and right top parts of the keyboard, which will unsnap little hinges, along with unscrewing the screws holding the "hinges" down, and you can lift that panel up. After that, it's simple laptop dismantling process, see a screw, take it out... Once you get under the keyboard though, you're basically done.

Posted on Jun 11, 2008

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Re: Cooling fan and heatsink.

Use t6 star bit take it all apart add new greese to it also to cool it down

Posted on Jan 25, 2008

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My hp pavilion model g6-2240as when restarting, states that the fan is not working properly and then cuts out in about 15 seconds. I do not know what to do. It has windows 8.1 operating system and the...

This is a common issue with laptops. Quite often, however, the problem is not the fan, but the heatsink that the fan blows the air over to remove heat from the processor. People tend to lay their laptops on their laps, beds, sofas, and carpets when they use them. This sucks massive amounts of dust, hair, lint, etc. into the cooling passages and clogs the heatsink. Many laptops are now made so that the heatsink can be removed for cleaning. If the heatsink is clogged, the fan cannot cool the processor and the processor overheats. This causes the cutting out for processor protection.

Aug 23, 2014 | HP Pavilion PC Laptops

1 Answer

My hp pavilion dv9720us will run for about ten mins and then shut off

you can try to hover around the fan outlet the dust gathers and stops the cpu cooling down and then the cpu wiil shut down to protect the laptop from overheating if it runs longer but shuts down you will need to get in to the laptop and do the same around the heatsink fan and cpu

Jan 08, 2013 | HP Pavilion dv9000z Notebook

1 Answer

I have a HP Pavillion DV9823Cl laptop. During initial power on, the lights come on briefly, then disappear, the fan starts, then stops. it continues a few times without ever startging the PC. One d

There was a recall on many of the Pavilion dv9000 series, of Notebook PC's. Ended April of 2009 officially first time, with an 'Enhanced Warranty' to January of 2010, being brought out.

" First Service Enhancement:
Laptop Models: HP Pavilion dv2000/dv6000/dv9000 and Compaq Presario v3000/v6000 Series Notebook PCs

The following symptoms apply to Pavilion dv2000 and Presario v3000 notebooks:
- The notebook does not detect wireless networks and the wireless adapter is not detected in the Device Manager.
- There is no video on the computer LCD panel or external monitor.

The following symptoms apply to the dv6000, dv9000 and v6000 series notebooks:
- The notebook does not detect wireless networks and the wireless adapter is not detected in the Device Manager.
- There is no video on the computer LCD panel or external monitor.
- The notebook has no power and no active LEDs.
- The notebook does not start.
- The battery charge indicator light does not turn on when the battery is installed and the AC adapter is connected.
- The notebook issues a single beep during boot indicating no power.
- The external monitor functions but there is no image on the notebook LCD panel."


Hardware issue.

Inadequate cooling for the GPU.
Graphics Processing Unit, or graphics chipset,

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

The GPU for the Pavilion dv9000 series Notebook PC's, is an Nvidia GeForce Go 7150M,

To explain further,
A) Starting with the inadequate cooling for the GPU:

The above link shows the Cooling System for the dv9000 series of Notebook PC's.

Looking at the top photo you are looking at a top view;

1) The black Fan Assembly on the left top,

2) The finned black Heatsink, which is on the bottom of the Fan Assembly.
{The Heatsink cannot be viewed very well in this photo.
It is a rectangular object composed of thin fins, attached to a plate of metal.

The length can be seen by the two tabs at either end. One tab sticks out on the left side, and the other tab sticks out of the right side. Each has a hole in it.

The thin fins cannot be seen. They are running in a vertical position, in this photo }

3) The curved copper Cooling Tube. (Slightly flattened copper tube sealed on both ends, and filled with Nitrogen )

4) The Cooling Tube metal plates. A type of Heatsink.

Looking at the top photo, view the aluminum looking metal plate to the right, that resembles a square inside an X.
This metal plate sits on top of the Processor.

Looking to the left along the Cooling Tube, and coming away from the processor's metal plate, is another small aluminum looking metal plate.
This small square metal plate, protrudes out of the side of the Cooling Tube.

This metal plate sits on top of the GPU.
It's size is too small for the job. Inadequate cooling surface area.

Heat from the GPU, and the Processor, is absorbed by the individual metal plates, which sit on top of them.
The heat is then absorbed by the copper Cooling Tube.

The Cooling Tube transfers the heat along it, to the Heatsink.
The thin, tall fins of the Heatsink absorb the heat, then radiate it away.
(Much like a radiator used in a home, or a car radiator)

The Fan Assembly pushes air through, and around, the tall, thin fins of the Heatsink, and helps to carry heat away from the fins.

B) BGA Surface Mount:

To explain the BGA surface mount;
Compare to an older Intel Pentium 4 processor, and it's Socket 478 processor socket,

The flat bottom of the Processor chipset has contact pins, which protrude out. 478 of them.
The Socket 478 processor socket has 478 socket holes, to match.

With a BGA surface mount there are no contact pins, nor socket holes.
The GPU chipset has Solder Balls on the bottom.
The motherboard has matching Copper Pads.

The GPU's solder balls are lined up with the motherboard's copper pads. Then heat is applied at a specific temperature, and length of time.
The solder balls melt, which in turn solders the GPU to the copper pads.
(In turn soldering the GPU to the motherboard)

With the inadequate cooling for the GPU, the GPU overheats.
Constant overheating one day leads to the solder connections partially melting.
Poor contact is made from the GPU to the motherboard.

This link is to a video to show you more. It is not linked for advertising, nor the repair method,

For additional questions please post in a Comment.


Dec 18, 2011 | HP Pavilion dv9823cl Notebook

1 Answer

Replacemother board dv 8000 hp lap top and trunall ligths trun on but blac k screen.

I'm going to assume it was yourself, or someone besides a tech, who installed this motherboard.
A tech would have the machine working before giving it back.

A) What was the original problem? Why motherboard replacement?

B) Do you know for a fact that the replacement motherboard is a good working unit?
Bought from a reputable dealer, or history of motherboard is known?

C) Did you follow Anti-Static Precautions, and used a ESD wrist strap, and connected it's alligator clip to a good ground source?

D) How acquainted are you with the design of a laptop's cooling system?
Aware of the basic design?

1) Air is drawn in for the cooling system usually from the Bottom of the laptop.
(Air Intake Duct. It is expelled through the Exhaust Port)

2) The air is drawn straight up into the cooling Fan.
Air then is pushed through the fins of the Heatsink

There is a Cooling Tube usually made of Aluminum or Copper. One end is attached to the finned Heatsink.
The other end is usually attached to a small metal plate.
This metal plate sits on top of the Processor.

Heat from the Processor is absorbed by the small plate. The heat is then transferred to the Cooling Tube. (Cooling Tube absorbs heat from the small plate)

The Cooling Tube then transfers the heat to the Heatsink.
The Heatsink absorbs the heat, then radiates it away with the tall, thin fins.
Air going through the fins, and around the fins, helps to carry the heat away.

Also on the same end as the Processor, is usually another small metal plate. This plate sits on top of the GPU.
Graphics Processing Unit, or simply stated as the graphics chipset.
(Essentially the 'Graphics Engine')

The Processor, and the GPU, are the TWO hardware components that PRODUCE the most HEAT.

Example of basic laptop cooling design I referred to above,

Scroll down to Step 29.
Here you see the black Fan Assembly.
To the immediate left of it is the finned Heatsink. Black in color, fins are not visible.

Coming down on the left from the Heatsink is a copper Cooling Tube.
Most of it's length is attached to an aluminum plate.
(Three machine screws hold the plate to the motherboard)

The aluminum plate you see is covering the top of the Processor, and also the GPU sitting next to it.

In looking at the Heatsink/Fan/Cooling Tube combination, for the HP Pavilion dv8000 series of Notebook PC's, I do not see a metal plate for the GPU.

I only see that the Processor is covered by a metal plate.




Heatsink with copper Cooling Tube attached, and small metal plate at the end for the Processor,


4) Motherboard,

This means there is no cooling for the GPU, except for air that may make it's way around, in the inside of the laptop.


A GPU is mounted to the motherboard with a BGA Surface Mount.
Ball Grid Array.

To explain a BGA surface mount;

Your motherboard has an AMD processor socket (Mobile) that an AMD processor fits in.
The socket has the socket holes, and the Processor has the contact pins, which go into the socket holes.

With a BGA surface mount there are no contact pins, or socket holes.
There are Copper Pads, and Solder Balls,

The bottom of the GPU chipset has Solder Balls.
The surface of the motherboard has matching Copper Pads.

The GPU is set into place with the Solder Balls lining up, to the matching Copper Pads on the motherboard.

Heat is then applied at a certain specific temperature, and length of time.
The Solder Balls melt, which solders the GPU to the motherboard.
(Solders the GPU to the Copper Pads on the motherboard)

IF, a GPU constantly overheats, the solder connections start to melt. This creates cold solder joints, and a black display on the laptop's internal monitor.

To summarize;

A) The motherboard that has been installed may have the same problem as the original one, if the problem was poor contact for the GPU.

B) If you did not follow Anti-Static Precautions, there's a good chance the motherboard is now an expensive paperweight, or doorstop.

For additional questions please post in a Comment, or to reply


Oct 23, 2011 | HP Pavilion dv8000 Notebook

1 Answer

I have HP DV dv6835nr laptop . It was working properly untill few days ago when the display screen showed some flickering and after few mins , its went to blank but the application windows and forms can be...

Your diagnosis is correct abhisheks27, it is a graphics 'engine' issue.

The HP Pavilion dv6835nr is one of the HP Pavilion dv6000 series of Notebook PC's.

The Pavilion dv6000 series Notebook PC's have an issue with inadequate cooling for the GPU.

{Graphics Processing Unit, or graphics chipset,

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

The cooling system consists of the Fan Assembly, Heatsink, and Cooling Tube.

Scroll down the page to Step 18, and it's second photo.
Here you are looking down at the top of the laptop, and can see the Fan Assembly, in the top left corner.

Steps 25 and 26 show the bottom of the motherboard, the Fan Assembly, Heatsink, and Cooling Tube.

The Cooling Tube is a hollow copper tube, slightly flat, and is filled with Nitrogen.
You can see it's curved J shape.

Looking at the photo in Step 25 observe the aluminum looking X shape, at the left side of the Cooling Tube. It has 4 red circles marking it's mounting screws.

This X-shaped object is a flat plate. It is a type of Heatsink.
This particular metal plate sits on top of the Processor.

Heat from the Processor is absorbed by this plate, then transferred to the Cooling Tube.

Observe the next aluminum looking plate to the right. Looks like a square tab, attached to the side of the Cooling Tube.
This metal plate sits on top of the GPU.

Heat is from the GPU is absorbed by this plate, and transferred to the Cooling Tube.

{Step 26 shows the top of the Processor uncovered, {Processor (CPU) }, and the GPU uncovered.
The GPU is the greenish square to the right of the Processor }

The cooling area (Size) of the small plate of metal, that sits on top of the GPU, is inadequate.
It cannot absorb enough heat away from the GPU.

This leads to the GPU overheating.

The GPU is mounted to the laptop's motherboard with a BGA surface mount.
Ball Grid Array.

To explain the BGA surface mount technology, I'm going to use an older Socket 478 Intel processor.

The Socket 478 Intel processor's have pins on the bottom of them. These pins line up with socket holes in the processor socket.

With the BGA surface mount there are no pins on the bottom of the chipset. (Chipset circuit board, actually)
There are Solder Balls in place of the pins.

On the motherboard there is no socket. In it's place there are Copper Pads.

The chipset is set into place on the motherboard, with the solder balls lining up with the copper pads.
A specified temperature of heat is applied, and this melts the solder balls. The chipset is soldered to the copper pads on the motherboard.

When the chipset overheats, (In this case the chipset is the GPU), the solder balls start to partially melt again.
This causes a poor connection due to cold solder joints.

{The solder balls have melted, and rehardened again. Not done properly this causes a cold solder joint }

The poor contact of the GPU to the motherboard caused by inadequate cooling, is the problem.

The solution is too have the GPU's BGA surface mount reflowed, and to install a better Heatsink plate for it, or add to the heatsink plate.

This is to show you more in-depth as to the problem. It also shows a possible solution.

I am Not providing this link for the possible solution it provides. The tech is also advertising selling a repair. I do not advertise for other people, and know nothing of this tech.

For additional questions please post in a Comment.


Aug 23, 2011 | HP Pavilion dv6835nr Notebook

2 Answers

My HP dv2000 laptop gets hot really fast that I could not use it without an external cooling fan...

Check the fan in the laptop to see if it spins freely, if it is faulty then replace the fan. The fan and heatsink may be clogged with dust, if so, then loosen the dust and remove this dust.

Jul 31, 2010 | HP Pavilion dv2000t 14.1" Notebook Laptop...

1 Answer

My dv9000 locks up after it gets hot. What can I do?

A laptop locks up or shuts down when it get very hot. The CPU shuts down (thermal overload) when it overheats and will not boot up until it has cooled down. If this problem is not fixed, eventually the CPU will fail.
This problem could be caused be a faulty CPU fan and/or the CPU and heat sink assemble is clogged with dust.
Check the CPU fan to see if the fan blade spins freely (it may have a seized bearing), if not replace the fan. If the fan and heatsink is clogged with dust, clean and remove the dust.
If additional cooling is required and there are ventilation grills on the bottom of the laptop, then purchase a laptop cooling pad. Place the laptop on the cooling pad, these pads have fans that direct air into the grills at the bottom of the laptop.

Jul 21, 2010 | HP Pavilion dv9000z Notebook

1 Answer

Computer shut down on it's own and will not restart. I get the blue lights on front but no other activity

You could have a faulty fan and/or heatsink/fan assembly clogged with dust.
When a laptop shuts down and will bot boot up again until it has cooled down, then this is a CPU thermal shutdown and if not corrected then eventually the CPU will fail completely.
Check the fan to see if it spins freely and turns on, if not replace the fan. Also remove the dust off the fan and heat-sink assembly.
If you are still having problems you can purchase a fan assisted cooling pad. Place the laptop on the cooling pad and it provides addition fan assisted air to the bottom of the laptop vents.

Mar 06, 2010 | HP Pavilion dv6000z Notebook

3 Answers

Gateway MX6453 overheated and won't power-up.

Yes I think it can be repaired.
Can I tell you what is wrong with the laptop, without physically looking at it myself?

You need to take it to a pro for a diagnoses.

Will tell you that when a Processor becomes too hot it turns off. (BIOS program turns it off)
This is a Fail safe feature built in that keeps the processor from burning up.

How did the laptop become too hot?
Usually falls within three categories, or a combination of them.

1.The laptop Cooling System hasn't been cleaned on a regular basis.

Cooling System:
A) Air Intake Duct,
B) Cooling Fan,
C) CPU Cooling Tube/Heatsink assembly,
D) GPU Heatsink assembly,
E) and the filter located in the output port, of the Cooling Fan's housing.

A, and B above can be cleaned by the user/owner, with a can of compressed air for computers, with the proper procedure.

[AC adapter {Charger} removed if plugged in, and Battery removed FIRST, for One. Compressed air from can must be applied in a correct procedure or damage to the Cooling Fan's bearings may result, for Two. There is more]

C, D, and E, require partial to complete disassembly of the laptop, and advise approached by a professional.

(CPU - Central Processing Unit, or Processor for short.
GPU - Graphics Processing Unit, or graphics chip for short.
Heatsink - resembles a radiator with it's finned setup. Like a radiator, the heatsink is designed to absorb heat, with air flowing over the fins of the Heatsink to dissipate the heat)

2.The laptop user continually blocks the Air Intake Duct.
A. With their clothes, (Sitting on lap),
B.Bed covers, (Sitting the laptop directly on the bed while using it)
C.Sit the laptop directly on a carpeted surface while operating it.

3.Physical Failures:
A.The Cooling Fan bearings are bad. The Cooling Fan no longer operates, or does so at a reduced rate.

B.The Thermal Paste has dried up in-between the CPU, and it's Heatsink. Lack of heat transference from the top of the CPU case, (Processor), to the Heatsink is minimal to zero.

C.The Cooling System for laptops is inadequate to start with.
All the hardware components are compacted into one tiny box. One small fan draws air through the laptop, with small inadequate heatsinks to dissipate the heat.

Add to this that some laptop designers fail to meet the mark, with their cooling system designs.
The laptop may need additional cooling, such as provided with a cooling pad.

The Gateway MX6453 Notebook PC,
uses an AMD Turion 64 X2 processor. [TL-52]

(TL-52. Operates at a maximum of 1.6GHz frequency rate. {1600MHz}
2x - 512MB L2 cache. 800Mhz Front Side Bus)

An AMD processor without cooling. will burn up in a New York minute!
This may be the problem now with your laptop.

Perhaps the laptop was used without the Cooling Fan operating, (Or operating at a less than capacity), and the laptop shut off. (Processor turned off)
Laptop was started again, and again, eventually to never start again.

Could be now that the AMD processor is fried.
If so, the Thermal Paste will need to be properly cleaned off of the CPU Heatsink assembly, and the proper amount of new thermal paste applied, with the installation of a known, good AMD TL-52 processor.

This is all I can offer from your brief diagnoses.

As for the SATA 2.5 inch harddrive you have in the laptop, just buy an external enclosure.

A decent SATA 2.5 inch external enclosure, is around $20.

(The width of the harddrive case in inches.
2 and a half inches, {2.5} for a laptop harddrive.
3 and a half inches, {3.5} for a desktop harddrive)

Remove the harddrive from the laptop, install it into the external enclosure, (Instructions provided with the enclosure), and plug it into any laptop, or desktop computer.

The external enclosure has a USB cable coming from it, that you plug into any USB port on a computer.
(You essentially now have an External Harddrive)

I do not recommend buying another Gateway MX-6453 laptop, and trying to install your harddrive you have now.

Because when Windows is installed on a computer, it assigns hash values to certain major hardware components, inside the computer.

You may think of these hash values as serial numbers. (They aren't, as no personal information of the computer owner is recorded)

Hardware components such as,
1) Harddrive
2) Motherboard. Or to be more specific, BIOS program, and version.
3) Processor
4) Graphics (GPU)
,and other hardware may be recorded.

You may be lucky, and Windows will want to be Activated again.
You may not.

Dec 17, 2009 | Gateway MX6453 Notebook

2 Answers

Hp laptop random shutdown - overheat?

Your CPU is likely overheating. Very likely the thermal conducting material between the CPU chip and the heatsink may have shrunk and now impeades the thermal transfer.
You may need to remove the heatsink and put new thermal paste and perhaps copper shim to restore the thermal contact to the heatsink.

Jan 04, 2009 | Everex StepNote XT5000T Notebook

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