Laptop heatsink mod!

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Sanjeet Arora

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I have a compaq v3425au laptop. it recently died; it didn't display anything when turned on. While searching for a solution i discovered this video on youtube and decided to perform the steps as mentioned, but i used a blower instead the bulb. Luckily, the laptop shows display and boots normally but the temperatures go as high as 100 deg. I fear that I may face the same problem again. I didn't follow one thing mentioned in the video i.e. the penny thing, couldn't find any copper material. So just applied tunix and used a the thermal pad which was already inside.

YouTube - HP tx1000 no boot / black screen / motherboard repair

But i think this copper idea is good, and will result in efficient cooling or Is there any other material or something else i can do to keep this laptop cool apart from a laptop cooler?? And kind of suggestion would be greatly appreciated.

And what is the normal temperature at which the laptops Gpu should operate?
 
55-60 are ideal, the lesser the temp:the great the life of the lap.look for further tips on the same situation from the web, your current GPU temp is NOT GOOD AT ALL.It may also cause further damages to the PCB & its other parts.

What was the temp: before the lap failed (under normal usage).

Does the TIM,Thermal Interface Material(thermal PAD) of the GPU properly replaced or just refixed !!.
 
No i didn't replace the thermal pad. Saw this TIM for the first time, didn't understand what it was:(. Before too my laptop worked at the same odd temp and it worked well for 1 and a half years! U just watch the video and see the penny he uses.

What i want to know is that the gap that exists between the heatsink and the nvidia gpu on the mobo is filled by the thermal pad by hp. However would using copper or any other material be a better option? What else can i do to keep it normal?
 
yes, many people recommend to use copper instead of TIM PAD.But you have to apply heatsink material on bothsides and also make sure that the thickness of the copper should be in a manner that there will no gap between the GPU & the lap body.(ie, you have to get correct sized copper plate),else you can contact nearest mechanical workshop to level the same ,but the finish should be smooth.In all cases its little difficult unless you have a proper Cu cut peice.Also try to use a good laptop cooler so that it can bring down the temp:too.

Also never press the laptop top body (under keyboard) firmly to get more contact!!!.both must be in easy fit ,not preseed FIT !!Also proper screwing also solves this issue by 40%.

in any case if the temp:goes beyond 140-160deg then the BGA GPU chip gets loose(as BGA balls looses its contact with the PCB) and many major problems may arise.SO DO WISELY...
 
Sanjeet Arora said:
The laptop has luckily started working now but the temperatures go as high as 100 deg.
And what is the normal temperature at which the laptops Gpu should operate. I have a gcard in my dekstop and it operates at 55-65 deg. I think that is the normal temperature. Plz correct me if i'm wrong.
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Make sure you are using the latest BIOS. There is a bug in the older BIOS with regards to when the fan should switch on.
I have V3000 laptop with a Nvidia 6150 GPU and the temp stays around 70-75 when watching a video.
 
Thank u very much for the info.

BGA (Ball Grid Array): Repairing and Soldering BGA. Just read this! Its amazing! Yes the copper plate that i get will be of the perfect size and i won't fit the plate forcibly. I know that the thermal interface material is used to fill the microscopic pits and not the big ones so smoothening the cooper plate surface would be necessary. I'll surely do it.

What should be the ideal temperature of the blower when using it to move over the nvidia chip? Don't remember what i had set but was pretty afraid that i might burn the pcb. Don't want to be unconfident next time if the problem arises.

What heatsink changes or replacement can i do to reduce temperature?

mndar said:
Make sure you are using the latest BIOS. There is a bug in the older BIOS with regards to when the fan should switch on.

I have V3000 laptop with a Nvidia 6150 GPU and the temp stays around 70-75 when watching a video.
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Great to know that your temperature is so low! Do u use a cooling pad also. Dude my laptop temperature goes 86 deg idle! Yes i know about the latest bios version. I have already upgraded it to F.3D but that is crape. Didn't help me in any way. The temps were still high:(
 
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