With the advanced level of electronics that are found in today's digital electronic Music gear, we have a tendency to think that if it is not a mechanical issue then the repair is a simple board swap. However, to truly excel in the field of high tech electronic repair, whether it be computers, digital audio workstations, digital pianos or your latest flat screen TV, a strong understanding of basic electronic theory is requisite. That knowledge seperates the average bench techs from the master technicians. Nothing can substitute for that foundation.