28 Jul
2019
28 Jul
'19
1:02 p.m.
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&so…
:
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.
>