Hello Mario,

I have IBM T61 that have same prob with GPU, but when I was lookin on net, if heating in owen really helps, so yes, it will but as far as I unerstand only temporary.

Problem is, that chip consists of bimetal and that thing have tendency for microdamages because of chip overheating. Baking it in owen will possibly melt matherials in chip and therefore it will work for few days before damaged place breaks once again. Second try to fix GPU this way will be useless because chip have tendency to have wound on same place and then there is not enough materiall to cure this wound again [and material structure is changing by baking it].
If you want to sell notebook imediately to some pawan store, than it is good dirty trick, but it will not help you after all and you will loose a time.

Cheers,
~  Overdrive
 
On 07/20/2013 01:37 PM, Mario Lombardo wrote:
> Ahoj Tomaš.
> Umm yeah I didn't mean reballing, but yes, I wrote that. lol! No, I'm not ready for that yet, but it sounds like loads of fun, and I'm willing to try it sometime :) 
> I meant like "reseating" or reheating the BGA from the top of the graphics chip (Nvidia).  I imagine that precision heat gun we have with the soldering rework station in the lab would suffice?  I don't want to use the oven in the kitchen because it is for food stuffs and also because the temperature, as I've read, can fluctuate radically.  Perhaps we can hack together a technical oven someday with precision temperature control :)
>
> I've read up a bit more, so now I must put the project on hold till we call Apple on Monday.  Otherwise, we can perhaps meet there sometime and try it?  If not on my GF's mac, I'd like to hack on some other failed Mac boards with the same problem.
>
> BACKGROUND:
> This is the output from Apple's proprietary "Apple Service Diagnostic" software, which ITS.cz had in their diagnostic inventory:
> FAIL address: 0x0000100, expected: 0xc0000100, actual: 0x80000000c0000100
> Frame Buffer Test - FAILED Error Code: 14
>
> Nvidia on Apple MacBook Pro is notorious for this, and the state of Texas has launched a class action lawsuit against Apple/Nvidia.  I'm writing this part to help other people that have the same problem how to get some compensation for this:
> http://support.apple.com/kb/TS2377
> https://discussions.apple.com/thread/2777887?start=0&tstart=0
> http://appleinsider.com/articles/10/09/29/07_08_macbook_pros_included_in_nvidia_class_action_settlement
> http://www.patentlyapple.com/patently-apple/2012/08/class-action-filed-against-apple-for-defective-macbook-logic-boards.html
> http://www.nvidiadefect.com/nvidia-settlement-t874.html
> http://nvidiasettlement.com/
>
> The other computers/laptops that were affected: Dell Inspiron, Dell Latitude, Dell Precision, Dell Vostro, Dell XPS and HP Compaq Presario and HP Pavilion and maybe more.
>
> zatím
> mario
>
> On  17 Jul 13, at 19:23, Tomislav Arnaudov wrote:
>
>> Hi Mario
>> reballing is very hard work
>> if you are not experienced to bga soldering you should leave this work to professional
>> if you only want to try it with possible board damage we can try it together in Brmlab
>> i have hot airgun with big power
>> normal cooking oven can reach up to 210 Celsius ... we have one small in brmlab
>> and nobody used it for cooking ( i hope ) :)
>>
>>
>> 2013/7/17 Mario Lombardo <mario@alienscience.com <mailto:mario@alienscience.com>>
>>
>>     (cs)
>>     Zdar BRMlabčky!
>>     Chci používat technické trouby. Musím se "vařit" motherboard k mému MacBooku Pro podle této internetové adrese <http://www.ifixit.com/Answers/View/9045/MBP+A1226+Logic+Board+last+resort+fix+for+nVidia+video+chip>. Může někdo mi dovolte použít takovou troubu (univerzita?)? Myslím, že 160-190°C, je stačí.
>>
>>     Díky!
>>     /mario
>>
>>     Hi BRM!  I'd like to use a technical oven.  I must "cook" (reball) the graphics chip of my logic board in my MacBook Pro as per this link <http://www.ifixit.com/Answers/View/9045/MBP+A1226+Logic+Board+last+resort+fix+for+nVidia+video+chip>.  Can anyone let me use such an oven, like at a university?  A range of 160-190°C, should be enough.
>>
>>     Thanks!
>>     /mario
>>
>>
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