The symptoms: the Mac can’t see any network
After the „cleaning”, the laptop booted and seemed fine. Except that during setup it got stuck looking for networks without finding any. And in Settings, the Wi-Fi toggle wouldn’t stay on: „Wi-Fi is off”, no matter how many times you tried.
„I know a guy”: why a surface clean isn’t enough
A wet laptop that boots after cleaning isn’t necessarily a repaired laptop. Liquid leaves residue that keeps corroding under components and under the resin some chips are secured with, where a brush and a bit of alcohol can’t reach.
Done properly, it looks like this: the board fully removed, an ultrasonic bath, inspection under the microscope and component-level diagnostics. Without that, the problem is only postponed and often gets worse.
How we found the fault: the thermal camera
A MacBook Pro board has thousands of components, and after liquid damage the fault can’t be seen with the naked eye. That’s why we don’t guess and don’t swap parts „on luck”. We power the board and look at it through a thermal camera: a faulty or shorted component draws current without doing anything useful and heats up, and the camera shows it immediately.
That’s exactly what the photo at the top shows. The reference area next to the connector sits at 20.4°C, room temperature. The chip marked in red reaches 60.6°C, three times as much, even though the laptop is doing nothing. A hot spot like that tells us precisely where the problem is, before we take anything apart or solder anything.
20.4°C
Reference area: the board at rest, at room temperature.
60.6°C
The suspect chip: heating up for no reason, a sign of a fault or a short.
0 parts
swapped at random. We know what we’re repairing before we start.
Why the Wi-Fi module isn’t an interchangeable part
On older laptops, the Wi-Fi card was a separate little board held by a screw. You took it out, put another in, done. On Apple Silicon MacBooks, it’s a completely different story.
Soldered to the logic board
The module is soldered directly onto the logic board, with hundreds of solder points underneath, and secured with resin. Removing it means clearing the resin and applying controlled heat without harming the surrounding components.
Programmed separately
A new module doesn’t work just because it’s soldered on. It has to be programmed separately, on a dedicated programmer, with the data that ties it to that specific Mac. Otherwise, the system won’t accept it.
Wi-Fi and Bluetooth together
On Apple Silicon, Wi-Fi and Bluetooth live in the same module. When one goes, the other usually goes too. A new, correctly programmed module brings both back.
Apple’s official fix for a failed Wi-Fi module is replacing the entire logic board. On a 16" MacBook Pro with M4 Pro, that’s one of the most expensive repairs there is, for a problem sitting in a single module.
We repair the module: we remove it, clean and prepare the area, program the new module on the programmer, solder it back on and test Wi-Fi and Bluetooth. The original logic board stays in the laptop.
Why not every repair shop can do this
Because it takes several things at once: a thermal camera and diagnostic equipment to find the fault, board-level soldering and rework equipment, a dedicated programmer for Wi-Fi modules and the experience to do it all without damaging the rest of the board. Most repair shops either point the customer to a new logic board or say „it can’t be done”.
As far as we know, we’re the only repair shop in Romania that repairs Wi-Fi modules on Apple Silicon MacBooks. Abroad, the procedure is known in workshops that specialise in logic boards, but it remains a niche repair, precisely because of the programming.
If you’ve spilled something on your MacBook
- 1. Turn it off immediately and unplug it. Don’t power it on „to see if it works”.
- 2. Don’t dry it with a hair dryer and don’t put it in rice.
- 3. Bring it as soon as possible to a repair shop that removes the board and cleans it fully, not just on top.
- 4. If it’s already been „cleaned” and a new problem shows up, like Wi-Fi, tell us. It helps us know where to look.
