Note that such modifications/repairs are only necessary if letting what might be a super capacitor in the PSU charge doesn't work. That solution was offered on a TechRepublic post.

Hey guys, I came across this machine at the Salvation Army for $15, and I'd love to get it going. It's an Acer Smith Corona PC220, 286, built Circa 1991. Have you managed to find a system diskette for the system? I'm new to this era of computing as well and I'm unsure if I need the exact img in …