Re: Resurrecting integrated circuits by cooking them.
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.
Re: Resurrecting integrated circuits by cooking them.
On 7/28/19 1:02 PM, Jerry Weiss via cctalk wrote: > 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. And of course, the solder is Pb-free... --Chuck
Re: Resurrecting integrated circuits by cooking them.
On 7/28/2019 4:24 PM, Chuck Guzis via cctalk wrote: > On 7/28/19 1:02 PM, Jerry Weiss via cctalk wrote: >> 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. > > > And of course, the solder is Pb-free... > > > --Chuck > > Exactly. And machines of that era had a lot of problems (I have reflowed two early PS/3's a total of three times, and a MacBook) as manufacturers climbed the learning curve. The Microsoft XBox 360 "Red Ring of Death" was another instance.
