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Broken NVIDEA GeForce 8400 M on Sony vaio PCG-7121M


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#1 Andre78687687

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Posted 18 September 2011 - 04:26 PM

Hello,
I have a Sony vaio PCG-7121M notebook. My Graphic card NVIDEA GeForce 8400 M must have a problem because I cannot access my account even after a complete formatting .

- I can only work on windows safe mode.
- when I turn on the notebook, after a few instants,it shows me the logo of Vaio or Windows but I also get vertical, colored bars on the background. After that I cannot reach the window which shows the Windows accounts.

Searching for solutions online I found on youtube that this Graphic card SONY vaio problem is rather common.

This is why I opened my laptop and took a photo of it so that you could suggest where the graphic card chip is located.
Here's the photo (alternatively you can check the file attached): https://docs.google.com/leaf?id=0B_7...Y5&hl=it&pli=1

After that I would appreciate a lot any suggestions on what to do with it, i.e., how to fix the graphic card problem.

Thank you very much in advance really

See you later

Andrew

Attached Files


Edited by Andre78687687, 18 September 2011 - 04:28 PM.


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#2 cryptodan

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Posted 18 September 2011 - 04:35 PM

Have you cleaned out the fan from Dust? It looks a bit dusty. Your video card which is either in the center or upper left hand corner is under that metal bracket.

#3 Andre78687687

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Posted 18 September 2011 - 05:25 PM

Thanks I 'll try right now! and what about the procedure after, i.e., how to fix the graphic card?

#4 Andre78687687

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Posted 18 September 2011 - 05:40 PM

I was able to shift the metal bracket and what is joined to it. Here's a new photo; I can't understand where the graphic card is . Any ideas?
please check the photo. https://docs.google.com/leaf?id=0B-I_TaQEfwaMNmI3YWQ3N2MtOWVlOC00MDAzLWFjZDktNjE1OGJjNmQ2YjMx&hl=en_US

I think this one is the chip, https://docs.google.com/leaf?id=0B-I_TaQEfwaMNDQxMWE4MDgtZDc3MC00NDJjLTkyMDEtYzM1MzhkMzBmODE4&hl=en_US

but I can't remove it.

Edited by Andre78687687, 18 September 2011 - 06:23 PM.


#5 cryptodan

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Posted 18 September 2011 - 06:24 PM

Clean off the thermal compound and apply some new paste that compound looks caked aka baked.

It looks like the second picture is the GPU look up the number on it.

Edited by cryptodan, 18 September 2011 - 06:25 PM.


#6 Andre78687687

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Posted 18 September 2011 - 06:58 PM

Hello,
This is all the information written on the GPA:

05N 3BS 080 SA2
TAIWAN
NF8497 00W
G86 750A2.


Clean off the thermal compound and apply some new paste that compound looks caked aka baked.


What kind of paste (glue you mean?) should I add? What do you suggest I do exactly?
Please have a look at this new picture, I tried to clean off the thermal compound.

https://docs.google.com/leaf?id=0B-I_TaQEfwaMZDQzOGYzMDctY2U1ZC00YTBhLTk2ZDctYjg5OTRmNGExYWQz&hl=en_US

#7 cryptodan

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Posted 18 September 2011 - 07:10 PM

That would be your GPU, and I would recommend Arctic Silver 5.

#8 Andre78687687

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Posted 18 September 2011 - 07:21 PM

Thank you for your help really.

How should I apply Arctic Silver 5 exactly? And it would be just that, and everything fixed? no reballing?

#9 cryptodan

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Posted 18 September 2011 - 07:37 PM

Well it would be a starting point for troubleshooting.

Use a pea sized amount and spread it evenly over your GPU and CPU and everything the heatsink touched.

Posted Image

See the red dots that where the paste goes.

Edited by cryptodan, 18 September 2011 - 07:51 PM.


#10 Andre78687687

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Posted 18 September 2011 - 07:57 PM

Thanks, I've just bough Arctic Silver 5 on ebay.


Your graphic explanation is amazing really!


I'll wait for the delivery and proceed with trying to fix everything.


I'll keep you up-to-date then!


Thank you again


Bye


Andrew

#11 giannis7

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Posted 06 April 2012 - 04:08 PM

Because i have the same problem and i want to fix it alone i want to ask you some questions.
The only thing that i must do is clean off the thermal compound and apply some new paste that compound looks caked and baked (Arctic Silver 5).
Only in three points in the picture??
There is possibility i must buy new chips??
How i know if the chips are damaged and want replacement?

Thank you and sorry for my english!!!

#12 cryptodan

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Posted 06 April 2012 - 09:25 PM

If the chips are damaged you will need to buy a new motherboard.

#13 giannis7

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Posted 07 April 2012 - 07:34 AM

Thank you!I'll start today and keep you up-to-date then!

#14 giannis7

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Posted 07 April 2012 - 10:02 AM

just now i've put the Arctic Silver 5 on the chips of graphic card but when i started the operation of laptop,it continued showing me blue lines. do you have any idea about what i have to do?

#15 cryptodan

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Posted 07 April 2012 - 11:58 AM

Then unfortunately, your video card is in the process of going out. Time to get another motherboard.




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