Fixing a Famicom Disk System

This isn’t the usual fare from this blog, but this is good information that took me quite some time to find. I’m also an avid video game collector, and i recently picked up a Sharp Twin Famicom and a few Famicom Disk System games; notably Kid Icarus and the infamous Doki Doki Panic!, which later became the USA/World Super Mario Brothers 2.

Anyhow, my Twin Famicom came with Super Mario Brothers 2 (known as the Lost Worlds outside of Japan) which works perfectly, but the game on the back (some sort of Tennis game) wouldn’t ever work. I didn’t think much of it, until both of my new games didn’t work either. I would receive an Err.21 or Err.22 message each time I attempted to load the games. The drive would attempt to read, come to a full stop (note: this is important!) and then attempt to read again, shortly before throwing the error message. (more…)