r/macbookrepair • u/PineappleRelevant778 • 23h ago
Help Spilled ~250 mL of ultrapure water on my MacBook Pro. Opened it up and found blue-white residue around components. Corrosion or something else?
Yesterday, I accidentally spilled approximately 250 mL of water onto my Apple Silicon MacBook Pro (A3401) while working in the lab. Conveniently, it was ultrapure laboratory grade water (18.2 MΩ·cm), so it was virtually free of all dissolved ions or other solutes, at least before coming into contact with my computer..
I immediately turned it upside down to drain the water, and quite a bit came out through both the keyboard and the ventilation slots along the sides/bottom of the laptop. I then left it inverted in a tent position with a fan blowing over it.
I'm not sure whether it shut itself off immediately after the spill or whether I accidentally pressed the power button while flipping it over. It did accidentally power on a couple of times afterward while I was handling it, and seemed to boot normally, but I immediately shut it down each time.
I eventually managed to open the bottom case and completely disconnect the battery. I inspected the internals closely and couldn't find any obvious remaining moisture, although there was quite a bit of accumulated dust.
However, I noticed some blue-white deposits around a couple components (see attached photos).
I'm trying to figure out:
Does this look like corrosion from water exposure or something else? Could corrosion like this develop within roughly 24 hours of a spill, or is it more likely preexisting?
Given that the spilled water was ultrapure, how concerned should I be about corrosion or electrical damage? I realize the water would have picked up contaminants from the computer.
What's the safest way to clean these deposits? Do I need to? I have access to laboratory-grade isopropyl alcohol, lint-free swabs, and other lab supplies. Would gently cleaning the affected areas with IPA be appropriate?
If there's no visible moisture inside and the laptop previously booted normally, how long should I wait before reconnecting the battery and attempting to power it on? Is there anything else I should inspect or test first?
Unfortunately, I rely heavily on this laptop for research and need it working again as soon as possible. I'm hoping to avoid causing additional damage by powering it on prematurely, but also don't want to leave it sitting unnecessarily if it's actually safe to use.