The 3 C’s = complain, cause, correction
6 step diagnostic process
1, verify the customers complaint
2, determine related symptoms
3, analyze the symptoms
4, isolate the trouble
5, repair the trouble
6, verify proper operation
Or do like some of my co-workers... do absolutely no research on your own, don’t consult the service info, don’t search for known issue, don’t verify the concern yourself, and instead, go around the shop and ask each tech what’s the most likely cause of this, then don’t listen to any them...
Or start multiple threads on your favorite forum....and do as above.....
Oh and only give part of the story, leave most of it out of your thread... who needs details anyways..... I just got back my Crystal ball from the Polishing shop. I’ll use that to fill in the missing info