Question about Intel D845GVSR Motherboard

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Hp pavilion 7955 motherboard problem

Hello. The 1.5 by 2 inch aluminum block that has came unclipped from the motherboard will not re-attach. Clips won't hold. Is there any home solutions or products that will allow the 2 clips and adhesive for the block to hold? Maybe an adhesive for the 2 clip prongs going into the motherboard? New clips or a certain type adhesive for the block? Looked at the motherboard schematic and think the block is the Intel845 memory controller hub(MCH). My computer runs slow when the block isn't attached and get a CLI monitor command app problem detected. Any home solution fixes would be appreciated. thx

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As long as the alloy block holds close to the chip to release heat youl be fine just tie some wire around it and the release point you dont even need it if you have enough eaxaust fansa running

Posted on May 15, 2010

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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,

http://www.insidemylaptop.com/disassemble-hp-pavilion-dv6-laptop/

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.

Point?
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.

Examples;

1) http://www.pchub.com/uph/laptop/423-55686-4713/HP-Pavilion-dv8000-Series-Cooling-Heatsink.html

2) http://cgi.ebay.com/HP-DV8000-8100-8200-Heatsink-Fan-Assembly-403826-001_W0QQitemZ280451159745QQcmdZViewItemQQptZLH_DefaultDomain_0

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

3) http://www.laptoppartsexpert.com/i-5846952-cpu-heatsink.html

4) Motherboard,

http://www.global-motherboard.co.uk/hp-motherboard/HP-Pavilion-DV8000-Motherboard-403835-001.html

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.

Point?

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,

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

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

Regards,
joecoolvette

Oct 23, 2011 | HP Pavilion dv8000 Notebook

1 Answer

Hp Pavilion 7955 won't recognize any


if it does'nt recognize any keyboard using usb or ps2 ports that means that you need to replace the motherboard or the system board of your desktop. var geo_Partner = 'd420811f-d70c-453a-bc20-eaee3c451b98'; var geo_isCG = true;

May 11, 2011 | HP Computers & Internet

1 Answer

1 short and 1 long beep - the computer does not boot, what might be the specific problem?


the beeps are post during post the very first work is done by the ram,all the memory in the ram is first transferred to the hard disk,and remains active untill turned off.
make sure that your RAM is securely seated
test or replace all the leads that attach to your hard drive make sure the connections are secure including electrical extensions + IDE,SATA the ones that attach from your
((motherboard to hard drive))
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
hope this helps

Jan 31, 2011 | HP 417035-001 - HP Pavilion dv2000 Series...

1 Answer

How can i restore my hp pavilion 7955 computer to factory settings


The Recovery Manager program makes it possible to restore your laptop to its settings as of a previous date or restore your computer to its original factory settings, which will erase all of your installed programs and personal data. Using the recovery partition allows you to bypass the hassle of keeping track of recovery discs, which could be damaged in storage, rendering them useless when you need them.


Instructions

    Access Recovery Manager During Windows Startup
  1. 1 Turn on or restart your HP Pavilion laptop.
  2. 2 Press "F11" when the "Press <F11> for recovery" message appears during the HP Pavilion boot process.
  3. 3 Select "Recovery Manager" from your list of recovery options and press "Enter." The Recovery Manger program will open on your screen, and you can begin the recovery process.
    Access Recovery Manager Within Windows
  4. 1 Click the "Start" icon or "Start" button in the lower left corner of your Windows home screen.
  5. 2 Click "All Programs" and then "Recovery Manager."
  6. 3 Click "Recovery Manager" again to open the Recovery Manager program on your HP Pavilion laptop.

Dec 13, 2010 | Computers & Internet

1 Answer

When power is turned on, one long beep and two short ones. No screen dispaly but lights are on. I am told the motherboard is gone.


the beeping sound is the post system searching for your hard drive and other connected devices make sure the RAM has a secure seating also
try replacing all the leads that attach to your hard drive including electrical extensions + IDE,SATA the ones that attach from your motherboard to hard drive
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
hope this helps

Nov 14, 2010 | HP 417035-001 - HP Pavilion dv2000 Series...

1 Answer

Why my pc?while it running it goes to sleep mode and restart.?


One bad/faulty lead can cause a computer with lots of problems
replace all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
hope this helps

Oct 09, 2010 | AMD 486542-001 - HP Pavilion DV7 Series...

1 Answer

I have no display on my HP tx 1000


this is a common failure for those who have this tablet pc. this fail is because gpu overheating so you can't get display on your screen only black blank screen with all light indicator on.
I have the same problem and I can fix by myself with little cost. all you need is aluminum foil and oven to bake your motherboard.
1. first you have to dissemble your notebook
2. take your motherboard out.
3. take everything that stick on your motherboard i.e sticker, cables, battery, rubber (everything .. that easy to melt)
5. place aluminum on your oven surface. place your motherboard and bake it about 200 degree celcius for a 7-10 minutes.

ok I found better tutorial for how to bake your motherboard.
http://www.associatedcontent.com/article/5790852/how_to_reflow_your_laptop_motherboard.html

Oct 04, 2010 | HP Pavilion tx1000z Notebook

2 Answers

Ho do I enter bios setup


Hello

From HP website - hit F1 or F10

F1 if the PC was built before 2006
F10 if the PC was built in or after 2006

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph07110&lc=en&cc=sg&dlc=en&product=68089

May 01, 2010 | HP Pavilion 7955 PC Desktop

1 Answer

Need to find a new alum&copper heatsink and fan combo


This is a standard micro atx board. The holes you are seeing will be on any 478 mobo, you just have to remove the black bracket, which is usually achieved by lifting the center pin in each of the corners.

Sep 02, 2009 | HP COMPAQ BUSINESS DESKTOP DC5000 SFF - 1...

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