Sony comes clean on faulty 8XXX series Nvidia Chips!

Discussion in 'VAIO / Sony' started by ScuderiaConchiglia, Aug 10, 2009.

  1. Babak-Online

    Babak-Online Notebook Enthusiast

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    Hi
    I have a FZ260 and I had this problem too.
    But today I solved the problem.
    First I removed cover then I removed the heatsink.
    Second I put a Aluminium Paper on the Graphic chip then I heat the chip whith a HeatGun (Heater) for 6 minutes.

    and NOW I solved the problem!! :D

    You can try this trick. It must work!!
     
  2. ngvuanh

    ngvuanh Notebook Deity

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    You only did a temporary fix. It will happen again once the chip gets hot.
    Lead balls under the chip need to be melted completely to fix the problem permanently.
    This process calls reflow.

    Sent from my SGP311 using Tapatalk 4
     
  3. ScuderiaConchiglia

    ScuderiaConchiglia NBR Vaio Team Curmudgeon

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    There is no permanent fix other than replacing the GPU. The problem was that the expansion coefficient of the materials involved were different. The expansion and contraction at different rates of these materials as the GPU heats up and cools down result in small cracks that become bigger cracks and eventual failure. Even a reflow will only result in a temporary fix.

    Gary
     
  4. ngvuanh

    ngvuanh Notebook Deity

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    Sorry, but it's not GPU issue. It is all about the joints between lead balls and device and motherboard. I have been fixing these laptops and other similar issues for years now and no one did happen again by just reflowing them in correct procedure. There would be some cases you have to reball the chip, but there is no need to replace them even though it's recommended by chips makers.

    Sent from my SGP311 using Tapatalk 4
     
  5. ScuderiaConchiglia

    ScuderiaConchiglia NBR Vaio Team Curmudgeon

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    Yes, it is most assuredly a GPU issue. Did you even bother to read the first message in this very long thread. Nvidia had a manufacturing issue with the original GPU chips on this VAIO model and many other laptops from other manufacturers. This defect is well documented. The defect is exactly as described in my post that you replied to. And while the fix you are suggesting will indeed work the problem can reoccur later. The only permanent solution was the one that Nvidia enabled thru SONY and other manufacturers and that was to replace the motherboard with a new one containing a CPU that didn't have the substrate issue.

    Go back to the top of this thread and read the posts. You'll see that Nvida admitted to the issue on this specific family of GPU chips.

    Here is more indepth info:

    Why Nvidia's chips are defective- The Inquirer

    Here is info about HP's response to the same issue:
    defective nvidia chip - HP Support Forum - 194569

    And this from Tom's Hardware:
    Nvidia's GPU Material Defect Cost $475.9 Million

    So you see, it was indeed a GPU issue.

    Gary
     
  6. arturs

    arturs Notebook Geek

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    Guys, maybe you can give me an advice!
    HAve VAIO VGN-AR720E since 2008. GPU is NVIDIA 8400M GT. Is this affected card? A week ago got an issue - during the boot screen and windows startup screen display is covered with dots and lines - blue, grey, green, whatever. Sounds like this issue. But when windows starts, screen is ok. But PC is running on standart VGA 8 bits. So performance has significantly dropped. Cannot install NVIDIA drivers, PC won't boot then i get blue screen.
    Is this the same issue that's being discussed there? Since i had not problems for 5,5 years, guess i'm not covered by extended warranty, right?
    What are my options. Is NVIDIA 8400M GT discrete card or it's soldered to motherboard? The only solution for fix is to replace motherboard? What could be the costs (motherboard+replacement work) of this? Would be thankful for any answer. Have heard that others suggest it is easier to buy new laptop. Is that true?

    Thanks in advance!
     
  7. ScuderiaConchiglia

    ScuderiaConchiglia NBR Vaio Team Curmudgeon

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    Yes, that is precisely the symptoms of the issue with the GPU chip.

    And yes you are beyond the extended warranty period. The chip cannot be readily replaced as it is soldered to the motherboard. The folks who claim to be able to repair the chip by reflowing are delusional. It is a temporary fix. If will work for a while but the problem will return. If you read the literature on the issue you'll see it is the result of a bad choice of materials that expand and contract at different rates causing cracks to appear eventually.

    Honestly your best bet is to get a replacement laptop.

    Gary


     
  8. arturs

    arturs Notebook Geek

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    Thank you, Gary!
    I thought that worst case scenario is the most real one. I think 5,5 years without problems with faulty GPU chip is not bad at the end :)
     
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