Exciting things you can read on a cold/wet weekend...
Many years ago I worked with a large computer (hardware) company...
We had weekly sessions to develop our diagnostic & fault-finding skills using KT methods.
Every now & then, the session leader would invite a non-technical staff member in - to diagnose a mini-computer fault.
With zero understanding of the equipment or experience - using the fundamental KT principals on the whiteboard he/she could ask symptomatic questions of the group and eventually (correctly) identify the faulty part - and sometimes rectify the problem on more than 80% of occasions - within half an hour.
That 80% also applied to the appearance of issues in peripheral, cables or power systems - not the actual computer itself.