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iFixit wants to fix the soldering iron
(www.engadget.com)
This is a most excellent place for technology news and articles.
Ah. Other than fixing the old Xbox360 RROD , I've never needed to do any BGA work, just circuit soldering
Those Nvidia cards used in mining and AI need reballs regularly, also ps4 south bridge often falls off, also intel sockets sometimes need reball, also you can upgrade ram on your phone and Nintendo switch
Oh for sure. I'm not knocking those that can do it, just that my regular soldering skills are shit enough that I'd probably be hesitant to reball something more complicated even with the right gear :-)