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Heatsink mount pins replacement - Computers & Internet

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Yes can, but you need to choose same model.

Posted on Nov 01, 2012


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Screen wont light up

wafy_m, the problem can be attributed to the graphics chipset, is lifting off of the motherboard.
The mounting has loosened.

This is because the cooling system for the graphics chipset, is inadequate.

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

The graphics chipset is the GPU,

The mounting of the GPU to the motherboard, is done with a BGA surface mount,

To explain a BGA surface mount, compare to an older Intel Pentium 4 processor, that uses a Socket 478 processor socket,

The Processor has contact pins on the bottom. 478 of 'em.
The Socket 478 processor socket has matching socket holes.

With a BGA surface mount there are no contact pins, nor socket holes.

In place of the contact pins there are Solder Balls.
In place of the socket holes there are Copper Pads.
(Which have a gold plating on them)

The graphics chipset is set into place over the motherboard, with it's Solder Balls lining up on the motherboard's matching Copper Pads.

Heat is then applied at a specific temperature, and length of time.
The Solder Balls melt, which solders the graphics chipset to the Copper Pads.
(Which in turn solders the graphics chipset to the motherboard)

With the inadequate cooling for the graphics chipset, after time the solder connections will begin to partially melt.

This leads to a poor contact of the graphics chipset to the motherboard, and the problem you are having.

As previously stated the cooling system for the graphics chipset, is inadequate.

Cooling System:
The cooling system consists of a Cooling Tube, Heatsink, and Fan Assembly.

The Cooling Tube is a slightly flattened copper tube, filled with Nitrogen, and sealed on both ends.

Towards one end of the tube is an aluminum plate. This plate sits on top of the Processor. Has four screws through it. Removing these screws removes the cooling system assembly.

Coming up the tube a little bit, is another aluminum plate. This one is smaller, and sits on top of the graphics chipset.

Connected at the opposite end is the Heatsink.
The Heatsink is a small thin piece of metal, with Tall, Thin, fins protruding from it.

Next to the Heatsink is the Fan Assembly.
The Fan Assembly, is a Fan inside of a cage, or shroud.

Draws air up from the bottom of the laptop, and pushes it through the Heatsink's fins, and out the side of the laptop.

Heat from the graphics chipset, and the Processor, are absorbed by their metal plates.
The Cooling Tube absorbs heat from the two aluminum metal plates.

The Cooling Tube transfers the heat along up to the Heatsink.
The Heatsink absorbs the heat, then radiates it away with the Tall, Thin fins.

Airflow from the Fan Assembly, helps to carry heat away from the fins of the Heatsink.

The surface area of the metal plate on top of the graphics chipset, is too small. It is inadequate in surface area size.

The one on the Processor is barely adequate.

The above is posted for reference. Pause the video at 7:43 to see the cooling system I described above.

1) Black Fan Assembly to the upper left.

2) To the immediate left side of the Fan Assembly is the Heatsink.
Black in color, slightly rounded outside edge, goes along the full length of the left side of the Fan Assembly. Hard to discern the fins.

3) The aluminum X shaped piece with 4 black screws in it, on the copper Cooling Tube, is the metal plate for the Processor.

4) Coming up the copper Cooling Tube towards the Fan Assembly, is the second aluminum metal plate. It is shaped sort of like an S, with flat ends. This plate sits on top of the graphics chipset.

Properly remelt the solder connections of the graphics chipset, to the copper pads.
Add surface area to the Processor's metal plate, and the graphics chipset's metal plate.

PROPER method is to use a BGA Rework Machine. Performed by a shop who has one.

ANY other method may is less than. The procedure may last a week, a month, or maybe longer.

There was a recall on this series of Notebook PC.
It is over,

[ No, replacing the motherboard does NOT cure the problem ]

For additional questions please post in a Comment.


Feb 17, 2012 | HP Pavilion dv9000z Notebook

1 Answer

Nvidia 8600gt 512 MB chipset is not working in my DV9700t HP pavallion laptop. Same model is not sold here so HP autorised service centre could not repair it, also this laptop was not having world wide...

The Nvidia GeForce 8600M GT chipset isn't the problem. It's the cooling system.

The cooling system is inadequate. It cannot cool the Processor, AND the Nvidia GeForce 8600M GT chipset properly.

HP knows this.

When the Nvidia GeForce 8600M GT chipset overheats, it comes loose from it's motherboard mounting.

The method of mounting the 8600M GT is connected in a BGA mount.
Ball Grid Array.

To explain:
A) Chip and Chipset are slang terms for I.C. Integrated Circuit.

B) GPU = Graphics Processing Unit

The GPU is mounted on a small circuit board, and then the circuit board has a method of mounting to the motherboard.

With a Processor, the chipset is also mounted on a small circuit board. On the bottom of the circuit board are pins. These pins go down into socket holes in the processor socket.
(Or you have Processors with the socket holes, and the processor socket has the pins)

Instead of pins for mounting, there are round solder balls on the bottom of the small circuit board.
On the motherboard area that the circuit board is to be mounted to, there are a matching number of copper pads.
(We are talking REAL SMALL here. Copper pads about the size of a straight pin head, solder balls about twice the size of this period >. )

The circuit board with it's solder balls, is set into position on the motherboard with it's copper pads.
Heat is used to melt the solder balls, and they solder to the copper pads.

The cooling system in the HP Pavilion dv9700t Notebook PC (Laptop) consists of a Fan/Heatsink Assembly.

The fan draws air up from the bottom, and pushes air through the fins of the Heatsink.
The Heatsink is attached to a long copper tube.
The copper tube has two flat copper plates on it.

One copper plate sits on top of the Processor's case.
The other copper plate sits on top the GPU chip.

Heat is drawn from the Processor, and from the GPU chip to the copper plates. The heat is then transferred to the copper tube, and then to the Heatsink.

It's a POOR design.

NOT having worldwide warranty? Oh?

Watch the entire video. Also states a method to fix the problem.

Nov 19, 2010 | HP Pavilion dv9000z Notebook

1 Answer

What is a common problem associated with desktop computers?

Number 1.

Power Supply failure.

TOP problem.

Also a Power Supply failing, can emulate issues that seem software related.
Doubt that your computer professor will know this, however.

(Can also be a bad Power On switch. The diagnosis should include testing both the Power On switch, and the Power Supply, by bypassing the Power On switch.

This is done with a jumper wire on the Soft Power On wire, {PS_ON. Green in color}, to ANY Ground wire, (Black in color), in the ATX {20 or 24-pin} main power cable connector.

Example of 24-pin ATX main power cable, and it's respective connector,

Bypassing the Power On switch turns the Power Supply on?
Problem is a bad Power On switch.
Bypassing the Power On switch does Not turn the Power Supply on?
Problem is a bad Power Supply)

Number 2 most rated problem, is the computer is dirty inside, as well as the inside of the Power Supply.

Most users are seemingly not aware, that the inside of a computer should be cleaned on a regular basis as needed.

Many may be timid in cleaning the inside of their computer.

Computer unplugged from power, Anti-Static Precautions observed, a can or two of compressed air for computers, could easily eliminate this problem.

Heatsink for the Processor is coated with 'Gunk'?
The Processor overheats, and BIOS turns the Processor off.

Same thing with the fan used to cool the Processor.
Whether it is a fan mounted directly on top of the Heatsink, or a computer case fan pushing air through a plastic shroud to the Heatsink.

Power Supply, (SMPS), cooling components.
This is the internal fan mounted at the back of the Power Supply's case, and the Heatsink's used inside the Power Supply.

[Basic construction of a Heatsink, is a plate of metal with tall, thin fins protruding from it.

The plate of metal absorbs heat from whatever object it is placed against, (Via a thin layer of thermal paste), and the fins absorb the heat from the plate.

The fins then radiate the heat away.
If a fan is used in conjunction with a Heatsink, the flow of air from the fan helps to dissipate heat away from the fins.
(Such examples would be a Processor's heatsink, and the heatsink's used in a Power Supply)

Sep 13, 2010 | Computers & Internet

2 Answers

It wont stay running, for more than 3 secondspress the start button and the fan starts to run then shut's down put in a new power suply same thing I'm plexed, it's like it's tripping a circuit breaker on...

Your computer is overheating.
When the procesor reaches certain temperature, it shuts down by itself as a self protection.mechanism.
You must replace the heat release compound with a fresh one, and also clean the heatsink from lint.
That will do.

Don't forget to rate this answer if it helps

Jul 18, 2010 | Medion M3 Composer 5200 PC Desktop

1 Answer

Is it possible fit replacement heatsink backplate?

Hi: The plastic heatsink mounts are available online, especially on ebay, and pay close attention to the type you have, the 2 hole mount. Another good option is to purchase aftermarket coolers, such as from Antec, Zalman or Cooler master. Every one I bought, came with the fan, heatsink, and mount.

Nov 17, 2009 | Gigabyte GA-7A8DW (MB7A8DW) Motherboard

1 Answer

I cannot remove the fan to replace the cpu chip

Sounds like the processor is getting an overheating code and shutting the system down or the processor is cooked and can no longer function. If you are trying to get an intel cooling fan off an intel chip, there should be four posts holding the fan in place, these posts turn 90 degrees and then when all four are turned , pull the fan off the mount. If yours does not have the four post mount, then it may have clips on either side of the heatsink, these should just be pried away from the mount and the heatsink will be free. If the heatsink is stuck to the processor, you will need a flat plastic pry tool to wedge under the lip of the proc and heatsink to separate them.

Nov 09, 2009 | Computers & Internet

2 Answers

Mits. 55" Model 55511

Get you a little solder and a cheap soldering iron and try soldering the vertical output ic which is mounted on a heatsink on the circuit board. Be careful when disconnecting plug connectors and I suggest marking them as you disconnect them. Also resolder the convergence i.c.s which are mounted on the largest heatsink on the board. Vert. i.c. has about 9 - 11 pins and convergence have about 25 ea. Start by carefully undoing all wire ties, remove the few screws that hold in the board then slide it back towards you to access bottom(solder side). For the most part, any component that is mounted to a heatsink gets hot and cools down when set is off causing cold solder joints. So any part mounted to a heatsink is suspect. This repairs a high percentage of sets like yours. Good luck, Russmann.

Jun 10, 2008 | Mitsubishi WS-55813 55" Rear Projection...

2 Answers

My SD-532HD5 turns on then goes back off...

That is an all too common problem in that model unit and I'm sure the manufacturer knows about it vividly, but would never admit knowing...
Pull the SMPS and inspect closely for ring-cracked solder connections. Use some really good magnification. Especially solder all of the heatsink mounted components and all pins on the smps transformer even if they don't look suspicious. Test fuses F201 (6.3a) & F202 (5a) for open and replace if necessary.
Lastly ESR any caps 100uf and above. There is a particular 1000uf cap, I believe near the transformer, that is almost always in need of replacement.

Oct 13, 2007 | Pioneer SD-582HD5 58" Rear Projection...

1 Answer


Hi, have you tried removing the CPU and using a Air Jet Spray can to clean all contact pins and pin holes? The problem sounds like a loose chip. So also check all on board chips are seated, including RAM chips. Air spray can be bought from most Computer stores. Goodluck mistyman

Sep 09, 2007 | ASUS NCT-D (90MSV430G0UAY) Motherboard

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