submerged Macbook A2141 - no power on, no voltages

[Sanevent]

Ok. here is an update. I received the new chip and did as you said. I measured around the chip and noted down everything. Then I removed the chip but fucked up during the process. After the removal of the chip, the PP1V05 pads on the board (all 3 of them) were missing. Since they go to the CPU, I guess the mac is dead as long as I won't replace the pads. So this is what I will do next, I think.

So far I only replaced traces on burnt phone boards but never needed to replace BGA pads. Should I just take some replacement pads and glue them onto the board, or is there another better process you recommend? Also, which glue should I use? I would have tried it with UV resin, but I don't know if it will work with sucha small contact area.

 

[2informaticos]

Not an easy job.
I only rebuilt pads under SMCs and CD3215 chips.
I never used replacement pads, just did some kind of spiral/circle with 0.01mm wire.
Reconnect to existing traces between pads was what I did; never used any glue under the chips.
Pads with directly connection underneath should be a nightmare.

 

[Sanevent]

I tried and archived this.
I know this is definitely not the prettiest job, but after 4 or more attempts it worked out and didn't floated away when I was cleaning the solder joints again. I'm 60% confident that this will work - maybe a bit less. I hammered down a piece of copper wire (the fine strand of it). Then I cut it to size and removed a bit more of the damaged layer. I expoxied it in with UV resin.

Please ignore the other ripped pads; those are n.c. and went missing because of the cleaning I had to perform more often than I would like to have done (because my replacements trace just wouldn't want to stay in).