Resurrecting integrated circuits by cooking them.

[Jerry Weiss]

This method is not limited to "vintage" components.

My MacBook Pro 2011 fails dues to its (famous) problem with the discrete 
AMD GPU connections.   A reflow restores the laptop, but inevitably I 
have repeat the process every few months. Depending on who you believe, 
the fault is with the A) poor thermal design, b) BGA solder used or C) 
bumps on the AMD GPU itself.  The reflow is easy enough to do, but 
disconnecting the very fragile cables to remove the motherboard is not 
for everyone. Using an inexpensive infrared thermometer improves the the 
process.

     Jerry

On 7/27/19 3:50 PM, Jeffrey S. Worley via cctalk wrote:
> On Wed, 2019-07-24 at 21:24 -0400, Pete Rittwage wrote:
> I did some lookup on the reflow temperatures for various solder
> materials because my gut told me 250 degrees is too low to do any good.
> Turns out this is so.  250 CELCIUS maybe, but Fahrenheit? not.
>
>   
> https://www.google.com/search?q=melting+point+of+solder&tbm=isch&source=iu&ictx=1&fir=lNlL1odJeOshrM%253A%252Cdl2_5Te6VgKpAM%252C_&vet=1&usg=AI4_-kRutgIaitoyNNmWoI_dbqyF1P0xmQ&sa=X&ved=2ahUKEwi17--3_NXjAhUK2FkKHZhiCaIQ9QEwAHoECAEQAw#imgrc=lNlL1odJeOshrM
> :
>
> Here's a link to that information.  It looks like 220 Celciums is about
> right.  So if you were in Fahrenheit then that would explain the total
> failure of the experiment and make it worth retrying.
>
> RSVP
>
> YHOSvt.
>
> ** TNM **
>>
>> I tried this a year or two back with about 30 x SID, VIC, and PLA
>> chips
>> out of C64's. I heated them in the oven at about 250 for 15 minutes.
>> None of them showed any more signs of life than before I tried it,
>> unfortunately.
>>