Not-charging tickets look different on every model, yet the fault space is the same six causes wearing different clothes. This matrix lets any tech triage a dead-charging iPhone from 8 through 15 in under five minutes, before any disassembly.
The Universal Triage Matrix
| Test | Result | Conclusion |
|---|---|---|
| Try 3 certified cables + 2 adapters | One combination works | Accessory fault - sell nothing, advise the customer |
| Inspect port with loupe | Lint/debris visible | Clean with plastic pick + isopropyl; retest |
| USB meter at the phone end | No voltage | Adapter/cable side; keep testing upstream |
| USB meter shows 5V, no charge | Phone-side fault | Port flex most likely; battery connector second |
| Charges only at an angle | Worn port or debris | Clean first; replace flex if cleaning fails |
| Charges but very slowly | PD handshake or battery health | Meter the negotiation; check battery health |
| Wireless works, cable does not | Port flex fault confirmed | Replace port flex |
| New flex, still no charge | Charging IC / board | Board referral - stop swapping parts |
Model Notes That Change the Order
- iPhone 8 / SE 2020: port flex carries the mic lines; confirm audio before closing.
- iPhone 11 / 12: check for prior screen jobs - battery connector lift during screen work mimics port faults.
- iPhone 13 / 14: Lightning port pins wear visibly; a loupe check settles most quotes.
- iPhone 15 family: USB-C debris packs at the plug lip; verify full-seat click before condemning the flex.
Quote Discipline
Run the matrix, tell the customer which line failed, and quote from the conclusion - not from guesswork. Shops using a visible protocol get fewer second opinions and fewer disputed invoices.
Stock for this workflow: charging ports by model, batteries for health-related slow charge, and flex cables for connector-level faults.
FAQ
Is the matrix valid for water-damaged phones? No - liquid intrusion skips straight to corrosion assessment before any parts swap.
Do I need a USB meter really? Yes; it converts five minutes of guessing into a 30-second measurement.
What if cleaning fixes it today and fails next week? Pin wear was the root cause; quote the flex replacement with the cleaning receipt credited.