False “big fault” moments
One logged case recorded an initial charging-IC diagnosis that turned out to be a faulty charging port. That kind of example is exactly why early assumptions have to be tested rather than trusted.
Charging problems can trigger wider symptoms
Dead cycling, no backlight, unstable negotiation and shutdown on charge can all start with charging-path or power-delivery instability rather than a single obvious part failure.
Why repeated pattern analysis helps
When multiple charging cases are compared, the lesson is consistent: the charging symptom is only the start of diagnosis, not the end of it. The same customer complaint can lead to very different real faults.