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PostPosted: Fri Nov 08, 2013 9:00 pm 
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Joined: Thu Nov 07, 2013 11:00 pm
Posts: 1
Laptop Make: Sony
Model: AR71M
Purchased From: Website Sale
Amount Paid: 629
Date Purchased: 19 Sep 2008
Date Failed: 02 Sep 2013
Hi Everyone, :nh
To start I would like to thank you guys for setting up this website. I'm glad someone is trying to help consumers fight theirs rights.

I have not read every post here, so please excuse me if I have missed answers to questions I'm going to ask. It just look like lot of info and I'm not exactly sure if my model is also affected by nVidia defect.

I think I will give you description of problem first.
In beginning of September this year my screen of my VAIO AR71M (with NVIDIA GeForce 8400M GT) became yellow.
( link to model specification: http://www.sony.co.uk/support/en/product/VGN-AR71M/specifications )

Not sure if I can describe it as tint, it's more like vertical yellow lines (pixel wide on every other column) on entire screen area.
Lines are visible as soon as I turn on my laptop - also in BIOS / before Windows boots up - so its most certainly hardware problem.
Booting in safety mode or even with drive containing different Windows version doesn't make difference, nor various nVidia drivers.

I have tried to connect my laptop to TV using HDMI but no video is displayed. Tv recognize my VAIO and vice versa but no video on TV screen.
However when I connect it via VGA output everything works just fine no yellow lines/tint. Video is pixel perfect same as performance of graphic applications / GPU benchmarks.

Initially I put HDMI issue on side as I haven't used it for a while and wasn't sure if it worked before yellow screen issue appeared.
Judging from working VGA output I have assumed it could be display panel itself or ribbon at fault. I have tried two different LCD panels and another ribbon/cable but problem still persisted.

Here is my question no. 1 :
Can this be faulty GPU if video output on external monitor is fine?

At that time I kind of gave up, when suddenly laptop somehow mended itself. I was using it connected to my TV (just like now btw) and yellow lines vanished leaving perfect video. It was with original LCD panel at that time and turned on for about half an hour.

I couldn't believe it but I was more than happy even when I had no clue what was cause of problem.
Anyway laptop was fine for about 2 months and then yellow lines reappeared briefly few times for like couple of seconds.
Few days after that lines returned when during streaming HD movie and unfortunately are still present.

question no.2:
Has anyone experienced similar problem with affected nVidia chipsets?

Before discovering this site I have contacted SONY support questioning if my Laptop can be affected by nVidia defective chipsets (SONY admitted few years ago that some models where affected). I got reply with list of models which not contained my AR71M, so basically answer was no. They offered my chargeable out of warranty repair. link to list -> http://genesis.sony-europe.com/instranet/ccil_sony/selfservice/searcher.jsp?DocId=124722&l=en_GB&m=VGN-FZ21Z

I've checked specification of affected models and one of them is almost identical to mine laptop: (most importantly it has same GPU)
http://www.sony.co.uk/support/en/product/VGN-FZ38M/specifications

question no.3:
How is that possible that same NVIDIA GeForce 8400M GT was faulty in one model and not another?
Was it just batch problem?
From my research, I did think all chips where affected. If that's the case SONY answer doesn't make any sense.


Apologies for long post or if anything isn't clear, English isn't my native tong. Btw laptop was purchased via Tesco Direct and it was paid for using Tesco Credit Card.

Any advice or thoughts would be greatly appreciated. Although it's 5 years old laptop, it has quite good spec plus was upgraded with Solid State drive and Win 7 few months ago. It's definitely fast enough for my needs and it would be shame to scrap it. ohh btw Q4: Could changing OS from Vista 32bit to Win7 64bit have any bad effect on GPU?

Many Thanks!
Martin


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PostPosted: Sat Jan 18, 2014 9:16 pm 
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Site Admin

Joined: Tue Jun 09, 2009 6:54 pm
Posts: 7864
Graphics Card: 8600M GS
Purchased From: High Street Store
Amount Paid: 0
Hello Martin.

Welcome to my forum and apologies for the delay in approving your post and my response to it.

I have been off my feet with another project for the last few months and have not had the time or opportunity to work on this forum.

I am back now and ready to help you all once again.

Is your case still ongoing or has it been resolved?

Please let me know and I will advise further.

Best wishes

Paul
The Admin Team

_________________
=======================================================
Calculate the minimum refund that you would be entitled to.
FAQ's
Why you should not accept a repair
Links to evidence
What is the Nvidia Defect?
Step by step help to getting a refund
Do you need an engineers report?
=======================================================


If you like what you see on this forum and would like to help then please post links to this forum in other forums or blogs. The more people we can help the better.


Please note that I am not legally qualified and I only offer my own personal advice. You are advised to seek professional legal advice for formal clarification of advice I give.


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PostPosted: Sat Jan 18, 2014 9:16 pm 
Offline
Site Admin

Joined: Tue Jun 09, 2009 6:54 pm
Posts: 7864
Graphics Card: 8600M GS
Purchased From: High Street Store
Amount Paid: 0
Hello Martin.

Welcome to my forum and apologies for the delay in approving your post and my response to it.

I have been off my feet with another project for the last few months and have not had the time or opportunity to work on this forum.

I am back now and ready to help you all once again.

Is your case still ongoing or has it been resolved?

Please let me know and I will advise further.

Best wishes

Paul
The Admin Team

_________________
=======================================================
Calculate the minimum refund that you would be entitled to.
FAQ's
Why you should not accept a repair
Links to evidence
What is the Nvidia Defect?
Step by step help to getting a refund
Do you need an engineers report?
=======================================================


If you like what you see on this forum and would like to help then please post links to this forum in other forums or blogs. The more people we can help the better.


Please note that I am not legally qualified and I only offer my own personal advice. You are advised to seek professional legal advice for formal clarification of advice I give.


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 Profile  
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