Video summary

I Think I Found the iPhone 16 Pro's Next Common Failure (And How To Fix It)

Main summary

Key takeaways

Product Review

Product Reviewed / Repaired

  • iPhone 16 Pro (board-level repair focus) — repaired after a unit would not power on or charge.

Note: This video is not a consumer “review” of an accessory. It’s a board-level repair workflow. The “product” is effectively the iPhone 16 Pro main board/charging subsystem, along with the tools used—especially a Mechanic USB‑C charging tester and a DC power supply + thermal camera.

Key Issue Described (What’s Failing)

  • The phone is “dead”: no signs of life
    • no charging
    • no meter response

Autopsy/testing finds:

  • A short on the main power rail (VDD main)
  • The short is identified via thermal imaging as being near a charging-related IC
  • The primary shorted component is removed and replaced
  • Initially it appears fixed, but later testing reveals a second chip was damaged during chip removal, so it’s replaced as well

Main Features / Techniques Emphasized (Tools + Method)

  1. Mechanic USB‑C Tester

    • Claims to scan USB port pins and detect charging-circuit faults localized to the charging port connector area
    • Uses a color/reading scheme:
      • Customer/host board shows 0.07 on outer pins (interpreted as short condition on this tester)
      • A known-good donor board shows OL (interpreted as normal / no fault)
    • After repair, the tester shows OL on the outer pins again, indicating the charging-path fault is resolved

  2. Known-Good Donor Board / Parts Comparison

    • The technician stresses that accurate diagnosis requires:
      • a donor board with known good readings
      • known good parts in stock
      • a known-good complete phone used as reference

  3. DC Power Supply + Boot Detection

    • Separates “no power” from “no charge” by measuring power draw while attempting to boot
    • Uses a battery-mimicking setup: injects ~4.2 V (charged battery level)
    • Observed behavior:
      • Working/donor board: minimal current until the power button is prompted
      • Failing board: ~2.4–2.5 A immediately when power is prompted → indicates a main power rail short

  4. Thermal Camera + Macro Lens

    • Locates the short by finding heat under shields
    • Since the short appears across the full board (VDD main everywhere), the approach is:
      • remove shields
      • scan broadly with thermal imaging
      • identify the hot chip region

Pros (What Worked Well / Benefits)

  • Fast fault isolation to a specific IC area using:
    • Mechanic tester (initial localization toward charging/connector area)
    • DC current monitoring (confirms main rail short)
    • thermal imaging (finds the actual hot spot that isn’t obvious visually)
  • Highlights that correct technique helps prevent:
    • random chip swapping
    • board damage from insufficient troubleshooting
  • After replacing the correct charging component(s), the phone:
    • boots to Apple logo
    • shows normal charging behavior on the tester

Cons / Downsides (Risks, Limitations, Costs)

  • Not DIY-friendly

    • Requires micro-soldering / board-level skill and appropriate tooling

  • Repair complexity and risk

    • Too much heat can separate the two-layer sandwich board
    • Too little heat can rip pads
    • Shield removal can introduce secondary issues—admitted tool damage to a second chip

  • Potential hidden costs

    • Need donor boards / known-good parts for validation and verification

  • Tester limitation

    • The Mechanic USB‑C tester does not detect every circuit
    • It focuses on issues at/around the charging port connector path

Numerical Readings / Ratings Mentioned

Mechanic USB‑C Tester

  • Faulty board: 0.07 on outer pins (interpreted as short)
  • Known-good: OL
  • After repair: outer pins read about 1.47 (still discussed as consistent with “high/OL-like” behavior), and the phone is working

DC Power Supply Current Draw

  • Main short symptom:
    • ~2.4–2.5 A at approximately 4.2 V when prompting boot

Charging Behavior After Repair

  • ~15 V and ~1.1–1.2 A steady when the Apple logo appears and charging is active

  • Mentions “131” briefly during “prompt to boot” troubleshooting after the first repair step (likely a current/draw reading; context indicates elevated draw before fixing the second chip)

Comparisons Made

  • Known-good donor board vs customer board

    • Donor shows OL
    • Customer shows 0.07

  • Visual inspection vs thermal imaging

    • The failed IC may look fine visually
    • Thermal imaging reveals the real hot path/short

  • Skipping verification vs proper troubleshooting

    • Criticizes “bare minimum troubleshooting then replacing chips” because it can ruin boards
    • Contrasts this with the described comprehensive approach using comparison parts and specialized tools

Unique Points Mentioned (Complete Set)

  • iPhone 16 Pro arrived dead:

    • no turn on
    • no charge
    • even a USB meter showed no response

  • Physical condition: good

    • no water damage
    • no dents
    • only a cracked screen protector

  • Mechanic tester details:

    • port-pin scanning logic
    • fault likely indicated by red outer pins / 0.07 vs OL

  • Board structure described:

    • two-layer sandwich connected via interposer
    • charging circuit located on one section

  • Short vs disconnection reasoning:

    • short indicated by readings; therefore no immediate focus on sandwich separation

  • Method emphasizes distinguishing:

    • no power vs not charging

  • Battery mimic method:

    • inject ~4.2 V
    • measure current draw patterns

  • Observed behavior:

    • immediate ~2.4–2.5 A draw → main power rail short

  • Thermal camera method:

    • shields complicate detection
    • after removing a shield, a chip becomes the hot spot

  • Charging IC identified as the initial culprit:

    • short cleared after replacing it
    • later prompt-to-boot shows another issue → technician suspects secondary tool damage and replaces another chip

  • Cooling approach:

    • steel block + fan to prevent overheating/secondary damage

  • Handling/heat references:

    • flux: Amtech flux
    • hot air removal: ~380°C / 50% air
    • solder: Kester 63/37 at 183°C (referenced)

  • EEPROM pairing concern discussed:

    • worries about EEPROM if replacement chips fail
    • believes EEPROM likely survives because original failure didn’t kill the first chip

  • After full repair:

    • Apple logo appears
    • phone works (PIN not provided by customer)
    • SOS shows (cellular possibly functional; no continuous “moving bars” issue observed)

  • Video ends with service/community mentions:

    • service offers (repair/data recovery)
    • B2B options
    • “VIP group chat” / community reference (panic log cheat sheet)

Speaker / Timing Views (If Multiple Contributors)

  • Single primary speaker/technician drives the full process.
  • Limited additional “speaker” content beyond references to known good parts and general technician/community commentary.

Concise Verdict / Recommendation

  • The repair demonstrates that the iPhone 16 Pro no power / no charge failure is caused by a main power rail short associated with a charging controller IC, with an additional chip damaged during removal.
  • Repair outcome: Successful—using board-level testing (USB port tester + DC boot draw + thermal imaging), the phone boots and charges normally (~15 V, ~1.2 A).
  • Viewer recommendation: Do not attempt without board-level experience and proper tools; the technician emphasizes it’s easy to cause secondary damage and stresses donor-part comparison and thorough verification.

Original video