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/
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?
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.
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.
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.
Macbook wont turn on Repairs we offer here in Adelaide includes a couple of simple steps:
- Get a Quote for the repair before any work is done, even over the phone.
- Free pick up from the client’s location in Adelaide. Or alternatively, drop in for a quick check while you wait.
- Confirming final cost and “Go” from the client.
- Repairing and ensuring everything works as expected.
- 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 high accuracy microscope, ultrasonic cleaning bath, reflow machine and tools for micro soldering 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.
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.
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.
Would you like to read more about our Macbook not turning on Repairs? Check out some of our published repair cases.
If your Macbook or iMac is causing troubles and you 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 repair your Computer quickly without involving high costs and long waiting times in repair shops.