Why does “reflowing” a gpu or similar electronic return its functionality?

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I work at an arcade as a mechanic, I know mostly general electronics information, so I don’t know a lot of the more advanced architectural side of computers. My boss told me to reflow a dead GPU to see if it would work, so as per the instruction of the Youtube video, I waved a heat gun over it for 8 minutes. Plugged it back in, and what do you know, it worked.

Why does this work though, from my understanding, all this does is soften the solder for a few moments before letting it cool again.

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Anonymous 0 Comments

You reflowed a gpu as per an youtube video and it worked. Man you were lucky. That is tipically hard work as everything, all the solder balls, need to be perfectly aligned.

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