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2015年3月にアップデートされたAppleのMacBook Pro 13" Retina Display Early 2015 はモデル番号はA1502、第5世代のIntel Core i5と i7プロセッサーが特長でForce Touchトラックパッドを備えています。

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Constant restarts after water spill, opened and cleaned, still no joy

Sorry this is a bit long, but I want to fill in the details.

Filtered water was spilled into a 13” MBP Retina while it was running on battery power. I opened the back cover and blotted up as much water as I could, then let it dry for several days.

On attempting to restart, it did nothing on battery, but started (on its own) when connected to the power adapter. Everything seemed normal, except a battery icon with an exclamation point, and a keyboard icon with US.

All keys seemed to work. The charger was orange, but then it said “service battery” in the menu bar. When the charger was disconnected it immediately shut off and would only start on the adapter.

That night, when plugged in, it would start and get to password screen, then randomly shut down and restart. It will do this over and over, never restarting at the same moment after the password screen and restarts endlessly regardless of using the keyboard, trackpad or anything. Resetting the SMC, zapping PRAM and disconnecting the battery and the keyboard didn’t change anything. Holding the power down breaks the cycle, but a soon as I hit the start key it starts again.

I stripped the whole thing down and examined the logic board and all circuit boards. Only one of the water detection dots turned a bit red, the one to the right of center at the bottom of the logic board. I found some blue corrosion on the battery board where the battery connects to the logic board. I cleaned everything I could with 91% alcohol, let everything dry, applied the thermal paste and reassembled and it didn’t work. It starts on its own and keeps restarting.

I can’t run any diagnostic or do anything else because of the restarts.

Since it does this without battery and keyboard disconnected, I assume the problem is not the keyboard. I didn’t disassemble the keyboard.

I’ve heard a dead battery can cause a boot loop on these models. Could it be the battery board has shorted, and I just need to replace the battery? It seems the board comes with the new battery, so it would be replaced.

Any thoughts are appreciated!

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Turns out, it will not start at all when connected to power but the battery is disconnected.

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I just want to update this in case anyone else has the same issue.

Replacing the battery fixed the restart problem completely. It passed the hardware tests and I put it through its paces to make sure nothing was amiss.

I stripped the computer down to components and examined everything under magnification. I found a couple of spots that might have had some dried water spots and cleaned them up with 99% Isopropyl alcohol and a toothbrush. I’m pretty sure though that the only corrosion was on the power board attached to the battery. That board took the brunt of the spill, but the new battery came with a new one.

I let it dry under a fan in a warm spot of the house for a couple of days. Put it back together and powered it up, and I’ve never been so happy to hear the startup chime! Fixed!

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Great job ;-) replacing that board was also a good idea.

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@bramdriesen Thank you for your help

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It’s difficult to assess, but given you’ve seen blue corrosion already, this could mean that some of the electronics are not connected anymore to the circuit board or make a bad connection. Even worse could be that you have fried some components because of a short circuit by trying to power it on after a few days. Water can take a long time to evaporate. Unless you have a good understanding of electronic schematics and a multimeter I would take it to a repair shop that also does micro soldering to have a look at it. They should be able to detect any shorts or failed components on your board.

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Spotopolis さん、ありがとうございました!
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