I have always been into electronics and soldering and stuff I had not really worked on many games until last year when a friend asked me to fix his famicom, I started taking apart stuff i had and seeing what components they used and spent 70 bucks on a lot of broken systems on ebay, I figured if i could fix 3 of them i would make a profit.
I watch retreoGameTech on youtube pretty often, Most of these things are pretty easy to figure out though (scorch marks on pcbs or popped caps) Honestly just find something broken and try to fix it, If it doesn't work its not like ya ruined it, it was broken anyway lol. Thanks for the kind words everyone, Ill be sure to take more pics when all my systems come in.