Back in the late 1980s I was working with a national organization non-profit organization that everybody knows. I was assisting them in the logistics area (read supply distribution area.) Being the only one that knew anything about microcomputers in the building, they brought me all of their stuff from home to fix. Since a large part of them were giving their time and labor free, I did not mind. One day someone brought in an old PC clone that he said just stopped working. When I opened it later that afternoon there was about 1" of dirt on top of the motherboard. Calling the person it seems that there was a flood in their house and they cleaned the outside of machine a week later and it ran fine for a month.
Given that this person was the third highest ranking management person in the division (and in the chain that signed off on my paychecks), I went to work cleaning out the machine. I worked on it on and off for two days and finally got a clean machine. The 40 MB hard disk was fine so all of their programs and data survived. Total replacement: 2 floppy drives and a power supply -- from the used parts box.
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