So, I've watched this video from Louis Rossmann:
If I got it right, then what he says is that reballing a dead flip-chip GPU doesn't repair it and that you have to replace the chip to repair it properly, as the problem is that the GPU has died and not the solder balls cracked.
He also mentions that, while reballing a GPU the inside of the chip also gets heated, reflowing the solder INSIDE the chip and that this is why the chip will work for a while afterwards, not the reballing.
I guess the solder inside the chip he talks about are the solder bumps in the following pics:
But why does reflowing the solder-bumps inside a dead GPU (essentially 'inner'-reflowing of the chip, if I get this right) revive it? I mean, the gpu is dead, why would reflowing the bumps fix it?
Thanks.