Chosen Solution
Hello everyone! I got a dreaded call from my superintendent stating she spilled water into her bookbag while her MacBook was put away inside of it. It must have been on, as it attempted to wake itself when she opened the lid to inspect the damage. From the get-go, the screen would only stay on for around three seconds and then go black but will come back on again when clicking the power button. The keyboard and trackpad are completely unresponsive outside of the power button. A few days later, she’s back and town and drops the MacBook off to me. External monitors, keyboards, and mice all work fine, but the reported symptoms are still occurring. I took it apart down to the logic board, both sides of which were rather immaculate, along with no corrosion observed on any parts. The only thing I can’t see without further disassembly would be the keyboard. I’m completely stumped with it. I’m really just looking for someone else to throw ideas at me before taking it to the Apple Store… Any help is greatly appreciated.
If the logic board is free from any signs of liquid or corrosion my guess is that the trackpad and/or the keyboard is the issue here. Did you remove the trackpad to see if water made it underneath? It’s a hotspot for liquid and because of the ties to keyboard data in most Macbook models, as well lid open/closed data, that sounds like it might be the thing to tie everything together. The screen could be turning off because of an issue on the lines which tell components if the lid is open or closed.
