Call 03 9563 8588

Quick Repair Summary

  • Device: 14-inch MacBook Pro 2024
  • Model: A2982 — please verify against A2992 before publishing
  • Logic board: 820-02918
  • Fault: Water damage, no power
  • Initial USB-C readings: 5V / 0.4A stable and 5V / 0.23A repeat rebooting
  • First repair: USB-C power-control circuit repaired
  • Main faulty chip: SN2012024
  • Second issue after boot: Microphone not working
  • Second repair: LR940 and microphone flex replaced
  • Result: MacBook fully functional

What We Found

The MacBook was not completely dead. The main power line was present, but the USB-C startup behaviour was still abnormal.

A small capacitor near the USB-C control area showed a very low diode-mode reading, which indicated a short. After removing it, the short reading improved, but the MacBook still did not start normally.

That told us the water damage had likely affected the USB-C control chip itself.

Close-up microscope photo of the 820-02918 logic board showing the repaired SN2012024 USB-C controller area on a water-damaged 14-inch MacBook Pro
Microscope view of the repaired SN2012024 USB-C controller area on the 820-02918 logic board, where water damage caused a no-power fault.

First Fault Found

The first major fault was in the USB-C power-control circuit.

We used a donor board and transferred the same-position SN2012024 chip. After this repair, the MacBook could boot into macOS again.

This is a good example of why board-level repair matters. The whole logic board did not need to be replaced; the fault was traced to the damaged USB-C control circuit.

Second Fault Found

After the MacBook started, we found another problem:

 
Microphone not working
 

Further testing showed the microphone power rail was missing. We found LR940 was open and replaced it. The power rail returned only partly, which suggested the microphone flex itself was also damaged.

After replacing the microphone flex, the MacBook was fully functional.

Replacement microphone flex assembly used to fix the microphone fault on a 14-inch MacBook Pro A2992 after water damage
Replacement microphone flex assembly fitted after testing showed the mic circuit was still dragging down PP1V8_DMIC, restoring full microphone function.

Why This Repair Matters

Water damage often causes more than one fault. A MacBook may start working after the first repair, but other functions can still be affected.

In this case, the repair had two stages:

  1. restore the USB-C power circuit so the MacBook could boot;
  2. repair the microphone circuit so all functions worked properly.

This is why we test the MacBook after repair instead of stopping as soon as it powers on.

Infographic showing 14-inch MacBook Pro 2024 water damage no power repair, SN2012024 USB-C controller replacement, LR940 microphone power rail repair and successful logic board repair
14-inch MacBook Pro 2024 water-damage repair infographic showing how a USB-C power fault was repaired first, then a microphone fault was traced and fixed.

Final Result

After the full repair:

  • the MacBook powered on;
  • macOS loaded normally;
  • the USB-C power fault was repaired;
  • the microphone fault was repaired;
  • the original logic board was saved;
  • the MacBook was fully functional again.

This repair shows one example of how we help customers recover their Mac instead of replacing it. See more completed Mac repair cases here:
Successful Mac Repair Cases

USB-C Charging Fault? We Can Help.

Need Help With a MacBook USB-C Charging Fault?

If your MacBook is stuck at 5V, keeps restarting, will not charge, or only some USB-C ports work, contact IT-Tech Online before replacing the whole logic board.

We provide professional MacBook USB-C charging repair and logic board repair in Melbourne, with mail-in service available across Australia.

Get a Free Quote

Related MacBook Repair Services