Repairing an old printing calculator

In 2025, I was browsing at my favorite Brooklyn thrift store 1 when I came across a 35-year-old printing calculator 2 . I'm usually pretty good about not hoarding junk these days but for some reason I couldn't resist taking a chance on this particular piece of junk. Once I brought it home, I was able to power it on using the included AC adapter. I felt a tinge of nostalgia as I watched the green…