On Monday, December 14, 2015 at 6:07:52 AM UTC-8, Cursitor Doom wrote:
Anyone care to share their experience on the correct approach to
troubleshooting?

Make a block diagram. It may only be a mental picture, but it's an important
step toward tracking a symptom down.

I taught a class of technicians once, from a local factory... the
block-diagram-exercise got them talking amongst themselves more
productively than any other lesson.