Q: How are circuits damaged inside an iPhone?
Circuits are damaged inside an iPhone the same way they are damaged in any other electronic device:
- Water. More technically, adequate moisture to short out any two or more adjoining traces while voltage is running through the unit.
- Heat. Overheating can literally melt some of the chips.
- Shock. Any shock (dropping, etc.) can break solder joints, or cause other damage.
- Temperature cycling. At some point, going from very hot (but not hot enough to immediately cause damage), to cool, to hot, and back, will cause stress fractures in chips, traces, or boards.
- There have been cases with other devices (I haven’t heard of it with iPhone), where malicious code (script, virus, etc.) has been able to permanently damage a chip.