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Here are some youtube video about circuit board and cpu, I thought maybe someone else might find it interesting also.
Kinda wish there was a video on the process of manufacturing video game systems...

This first one is about the how a cpu is made.I think it is Amazing how complex technology has evolved.
https://www.youtube.com/watch?v=qm67wbB5GmI

And this second one is about how to repair a simple circuit board that is cracked in half.
https://www.youtube.com/watch?v=g6_piarjTKI