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Gforce 8400GS not recognized by notebook


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#1 Foxtrot2112

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Posted 21 August 2010 - 07:08 PM

Good Day,

I have a Sony Vaio VGN-SZ750N that came with that graphics card.
Problem is all of a sudden it stopped working and the system is using the Intel that comes along with the motherboard.

When I try re installing the Nvidia drivers I get a message saying that the installation program cannot find a driver compatible with the current hardware.

Could the card just died ?
Running Vista Business SP2

Thanks in advance.

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#2 MrBruce1959

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Posted 21 August 2010 - 08:13 PM

Hello and welcome to Bleepingcomputer.

First, I want to provide you with the downloads and support pages for your laptop.

http://esupport.sony.com/US/perl/swu-list....Z750N&LOC=3

Try downloading your drivers from this link as they may be more updated for your system, than what ever drivers you may have tried to use.

Let me know if these work or not.

Kind regards.

Bruce.
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#3 Foxtrot2112

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Posted 22 August 2010 - 03:34 AM

Bruce,

Thanks for your reply.
I actually downloaded the drivers a couple of days ago from the Sony Support page, for the exact make and model of my notebook, but these fail to install.

For your guidance my notebook is trojan/virus free.

Wondering if there's any way to check if my graphic card is fried.

Thanks !

#4 Platypus

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Posted 22 August 2010 - 06:02 AM

Sony basically say if it stops working, it's fried. I don't think there would be much doubt that your notebook has suffered the nVidia failure, Googling will find people unhappy that Sony excluded their SZ series from the warranty extension:

http://esupport.sony.com/US/perl/news-item...amp;news_id=349

"Q1. How will I know if my unit is affected?
A1. Affected units may exhibit distorted video, duplicate images or a blank screen on the computer screen."

A model with the hybrid graphics operates permanently in Stamina mode, using the Intel integrated chipset graphics.

Edited by Platypus, 22 August 2010 - 06:07 AM.

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#5 MrBruce1959

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Posted 22 August 2010 - 08:31 AM

Thanks for that link platypus. :thumbsup:

I looked at that page, it appears only the models with this model number below were affected with this problem.

VGN-AR1xx, VGN-AR2xx, VGN-AR3xx
VGN-FZ1xx, VGN-FZ2xx, VGN-FZ3xx, VGN-FZ4xx
VGC-LT1xx, VGC-LT2xx

The laptop we're working with is this one VGN-SZ750N.

If that is the letter S before the Z then I do not think this model applies to the problem.

However that's not to say that my assumption is correct.

I do not see any reference to the GeForce 8400GS graphics accelerator.

Foxtrot2112 have you tried the Nvidia web site for the driver? http://www.nvidia.com/page/home.html

Bruce.

Edited by MrBruce1959, 22 August 2010 - 11:39 AM.

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#6 Platypus

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Posted 22 August 2010 - 11:04 AM

Yep, people who have had the nVidia chip fail in their SZ series believe Sony has ducked out of including it in the program because the hybrid graphics reduces the loading on the nVidia chip and extends its life, making the series seem to not have such serious problems.

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#7 MrBruce1959

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Posted 22 August 2010 - 11:43 AM

Yep, people who have had the nVidia chip fail in their SZ series believe Sony has ducked out of including it in the program because the hybrid graphics reduces the loading on the nVidia chip and extends its life, making the series seem to not have such serious problems.


Very good, I believe you could very well be correct.

Thank you for posting this very useful information, :thumbsup:

Bruce.
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#8 Foxtrot2112

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Posted 22 August 2010 - 04:39 PM

Thanks Bruce and Playtus,

Just to mention that I haven't seen any quality changes in the day to day graphic performance of the computer.

But I play a sailing simulator called Virtual Skipper 5 and if you open the attached screenshot you will see that where I circled in red, Gforce 8400GS used to appear. That's what gave a hint that somethings wrong with the graphics card.

Is there any software to check if the card is dead ?

All of the Nvidia driver provided by Sony for this model fail to install.

Here's a link of my computer specs: http://www.sonystyle.com/webapp/wcs/stores...#specifications

Thanks

Attached Files



#9 Foxtrot2112

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Posted 23 August 2010 - 01:28 AM

Found the error.
So stupid me, didn't realize notebook was set to Stamina mode instead of Speed.

Feel embarrassed.

Thanks for all your help.

#10 Platypus

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Posted 23 August 2010 - 03:50 AM

notebook was set to Stamina mode

I will admit I assumed that would have been already eliminated... assumed wrong :thumbsup: Glad you got it sorted out easy!

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#11 MrBruce1959

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Posted 23 August 2010 - 08:13 AM

Found the error.
didn't realize notebook was set to Stamina mode instead of Speed.
Thanks for all your help.


I removed some of your quote above, because I do not believe anyone is stupid, we are all human, we all are in a learning process. :thumbsup:

You're welcome for the help, this is what the forums are for, sometimes it helps us make our own discoveries by discussing our concerns with other people.

Bruce.

Edited by MrBruce1959, 23 August 2010 - 08:13 AM.

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#12 Foxtrot2112

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Posted 23 August 2010 - 01:24 PM

Bruce,

Thanks, was being too hard on myself, been around fore years with computers, but failed to follow the golden rule of starting by the ''obvious''.
Like they say, most computer problems are located between the keyboard and the chair.

Thanks again.

#13 MrBruce1959

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Posted 23 August 2010 - 02:20 PM

Like they say, most computer problems are located between the keyboard and the chair.

Thanks again.


LOL!!! :thumbsup: That quote made my day and is SOOOOO....true! :flowers:

I want to thank you as well for the laugh. :trumpet:

Kind regards as always.

Bruce.
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#14 Foxtrot2112

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Posted 23 August 2010 - 02:36 PM

Bruce,

Don't know if this is the correct forum.
But hopefully my last problem is that lately every Plug and Play device that I add fails to work/install. It happened with a new iPod and a new external HDD, all USB.

It's recognized by device manager with a yellow exclamation mark and when I ask Windows to search and install the drivers I get a message that the drivers where not found.
FYG, when I plug an older external HDD it connects without problems.

Can you help me ?

Thanks.

#15 MrBruce1959

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Posted 23 August 2010 - 05:15 PM

Your USB ports may not have the power to support the hardware.

Older USB ports were 1.0 some newer hardware is 2.0 and 3.0 and requires more power.

I am not 100% if sure this is your problem or not. But I also have to ask if you have any settings in the BIOS for USB to which are not set correctly.

You may want to check for BIOS for this possibility.

Bruce.
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