We used to do development on various MSX machines (we were doing implementations of Logo). The machines were never designed to work in low-humidity environments (winter time in Montreal). Once I accidentally zapped four machines while attaching an emulator board. We had sets of all the custom chips shipped in from Japan, and I spent four days with the VP R&D fixing them. We got three of them to work eventually (there were no spares of the computers as they were prototypes and in short supply). Fun times.