Not everyone understands what a completely rational process this is, this maintenance of a motorcycle. They think it’s some kind of a “knack” or some kind of “affinity for machines” in operation. They are right, but the knack is almost purely a process of reason, and most of the troubles are caused by what old time radio men called a “short between the ear-phones,” failures to use the head properly. A motorcycle functions entirely in accordance with the laws of reason, and a study of the art of motorcycle maintenance is really a miniature study of the art of rationality itself.
Zen and the Art of Motorocycle Maintenance
The above remains true for the troubleshooting of computers and virtually anything else. If you have not read this book you should.