2018 Macbook Pro Repair A1989 – Not Turning on Repair

One of the very rare cases where the manufacturing fault caused a Macbook Pro Not to Turn on and stop functioning two years after the assembly.

This Macbook Pro died with no reason after it was used primarily on a desk in an office for business practices. “Yesterday morning it just didn’t turn on” – Customer reported

Hopefully, soon we will see local manufacturing of these machines in every country, and we won’t be relying on a low-quality workforce, rather than we would get quality builds. Like the old Macbooks used to be.

Even if that means that a price hike is inevitable – https://9to5mac.com/2019/09/23/2019-mac-pro-will-be-made-in-united-states-after-facing-trump-tariff-uncertainty-doubles-american-made-component-value-over-last-model/

Repairing Macbook Not Turning on in Adelaide
Repairing Macbook Not Turning on in Adelaide

The first thing we did was to check if it pulls any current. We do not have those lovely green/orange lights on the chargers anymore. So we can’t even see if anything is happening with the Macbook when it is not turning on. New generation Macbooks usually stays on a black screen with no signs of life.

It may be a bit hard to see on the top left corner of the picture. It requests 20V from the charger, but there is no current consumption. Which tells us that there is is no voltage even reaching voltage controllers so they can turn on and start distributing the power within the Macbook

Macbook not turning on Repair Process

We wanted to see what is causing this Macbook not turning on, so we took it apart. The first thing we noticed is that 2-year-old MacBook sitting mainly on a desk, had battery cells start expanding. What does this tell us about the quality of battery cells on new Macbooks?

Macbook Battery Cells Expanding
Macbook Battery Cells Expanding

Hard to see with an untrained eye, there was a little scratch around the screw assembly point. Looked a lot like a screwdriver has slid when the assembly worker was putting screws.

Damaged resistor pad we noticed while performing Macbook not turning repair
Damaged resistor pad we noticed while performing Macbook not turning repair

Under a microscope, it was clear that screwdriver must have hit the corner of the resistor (little vertical black component) and destroyed most of its bottom connection pad.

We needed to know the value of the damaged resistor. Only way we can know it is by relying on schematics. Thanks to leaked documents from the manufacturing process, we signed through the schematic and boatd files to trace a d identify the componwnt in quwstion.

Removing not functioning Macbook keyboard
Locating damaged resistor on the schematic and board design

We started measuring primary voltages around and noticed that one of the first line voltages were not present as an output from the voltage regulator. This voltage enables a MOSFET which then turns on PP5V_G3S voltage, which is the main voltage for the 5V power lines in the Macbook.

Cause for Macbook not turning on Repair
Preparing damaged resistor for a soldering process

Macbook wont turn on Repairs we offer here in Adelaide includes a couple of simple steps:

  1. Get a Quote for the repair before any work is done, even over the phone.
  2. Free pick up from the client’s location in Adelaide. Or alternatively, drop in for a quick check while you wait.
  3. Confirming final cost and “Go” from the client.
  4. Repairing and ensuring everything works as expected.
  5. Returning repaired system back to the client. Or the client can pick it up from our workshop.

We have sophisticated equipment in our workshop with a high accuracy microscope, ultrasonic cleaning bath, reflow machine, and micro-soldering tools to achieve high-quality logic board repairs. With hundreds of components in stock, we can quickly locate and replace faulty chips, resistors, and capacitors in Macbooks.

Replacing faulty resistor on Not turning on Macbook Repair
Replacing faulty resistor on Not turning on Macbook Repair

Knowing the exact value of the damaged resistor, we have replaced it. These are tiny components as seen on the picture below and hard to see with the naked eye.

Size of a resistor in Macbook Pro - Macbook not turning on repair
Size of a resistor in Macbook Pro – Macbook not turning on repair

Please note: This is not an educational material,
it is rather a showcase of services we offer.
Therefore, it should be used as general guidance of what to expect of such repairs.

The Result of the Macbook Repair

After a successful repair of its logic board, this Macbook is turning on now and working as expected. It is unbelievable how this little damage did not get caught at the assembly testing process, and stress on the board from typing was enough to interrupt the trace and cut the line.

Macbook showing correct voltage and power draw - Macbook Repairs
Macbook showing correct voltage and power draw – Macbook Repairs

Would you like to read more about our Macbook not turning on Repairs? Check out some of our published repair cases.

Successful Macbook not turning on repair
Successful Macbook not turning on repair

Call us today for your Macbook Repair in Adelaide

If your Macbook or iMac is causing trouble and need a Macbook Repair Service in Adelaide, give us a call, and we will advise for the best scenario to get your device repaired.

We at IT-Solve, specialise in computer and electronics repairs. And we will do our best to quickly repair your computer without involving high costs and long waiting times in repair shops.

Call us now on 0469317177 or drop us an inquiry via Text us via Whatsapp MessengerWhatsApp or Text us via Facebook MesengerMessenger – Our engineers will respond quickly to your question.