Water spill, thermal sensor, kernel_task, oh no.

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MacBook Pro 13" Unibody Late 2011

Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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Seymor Butz @breathlungs

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Опубликовано: 3 янв 2024 г.

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Water spill, thermal sensor, kernel_task, oh no.

2 weeks ago: spilled a small amount of water on keyboard. Immediately flipped upside down, shut down, partially disassembled, removed battery, left to dry in the sun for a couple of days.

Moment of truth, tested, hardware boot test passed, and the OS was working, all was good.

Flash forward to today, wake up from sleep mode to find a very slow mac, saw kernel_task using most of it, almost impossible to use, had to force shutdown. Hardware test again, this time the error code returned was:

4SNS/1/C0000008: TP0P--124

How sad.

So now I seek advice from the counsel of of experts. Please advise on the next steps I should take.

----

Edit: I have tried disconnecting the airport card, track pad, and CD-drive, keyboard, microphone, Webcam, everything except the storage and battery, as some others with this same problem reported that's all it was, like a messed up airport cable, however the problem persists even with all these things disconnected.

I'll add some more photos of the board. Tell me if you see anything obvious. (full album here: https://imgchest.com/p/dl7pj6aop7o)

Update: can't see any corrosion but atttempted a cleaning of the logic board with cotton Q-tips and alcohol. No difference 😔.

---

Full list of bad temp sensor data:

TP0P: PCH Proximity

Th1H: Heatpipe 2

Ts0S: Memory Proximity

Now maybe that can help narrow down where the damage is. If more alcohol cleaning doesn't fix it, well I don't know how to SMD solder...

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@breathlungs since this has been brought on by water damage, you do want to remove the logic board and clean it. Use some high concentration isopropyl alcohol and a soft brush to clean your board. It is possible that this is a true error brought on by the sensor Before it's cleaned, take some good pictures of it, both sides, and post those with your question. That way we can hopefully "see" where there might be a damaged component etc.

Adding images to an existing question

4 янв 2024 г. из oldturkey03

Certainly will do, give me some time. (I still have nightmares about that keyboard's ZIF connector...)

Do you know which temperature sensor TP0P is referring to?

4 янв 2024 г. из Seymor Butz

@breathlungs that is your Platform Controller Hub sensor and if I remember right it is on the top side of teh board (The side that faces the keyboard :-)

4 янв 2024 г. из oldturkey03

@oldturkey03 photos added to post, along with an edit of some of additional steps tried. When looking at the board, I'm not sure what to look for, but the only thing I see is some slight discoloration on the airport cable (though disconnecting that made no difference) and then possible something on the DC-in board, but it could also be just dust. I cleaned both but no dice.

5 янв 2024 г. из Seymor Butz

I know it's an older machine but these 2010-2012 MBPs are great, and I'm not in a position to buy a new one, so hoping to repair it it. Maybe some greys like @danj can take a whack at it. 🙂

6 янв 2024 г. из Seymor Butz

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daniel @tech_ni

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check around u5520

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This was helpful. Inspecting there, found some corrosion, I guess, pretty much right around that area (kind of hard to tell without magnification, and on a black board...), removed the small heat sink, toothbrush alcohol cleaned, in several places that looked similar. Ran EFI ASD again: this time only Th1H is failing. An improvement. Though in the OS I still see the Ts0S failing too

Th1H... "Right fin stack proximity" ... Now where is that... OK found it, it's Q5520, and that area of the board is spotless, it's connected to the same U5520, so maybe I can do a once in over and inspect traces around there... implying I'd even be able to find them lol

Next is the memory proximity, Ts0S. I believe this is Q5510.

After finding them, does this sensor failure mean the problem is at this particular part on the logic board, or rather on any one of the traces leading to/from it?

21 янв 2024 г. из Seymor Butz

After a more vigorously toothbrush ISO scrubbing. I now have a full speed MBP with all temp sensors in working order. Thanks.

I got 99% iso and just went at it with the toothbrush like a dentist gone postal.

It worked!

edit: 30 minutes later -- and now they're failing again. *grabs toothbrush...*

26 янв 2024 г. из Seymor Butz

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@breathlungs since this has been brought on by water damage, you do want to remove the logic board and clean it. Use some high concentration isopropyl alcohol and a soft brush to clean your board. It is possible that this is a true error brought on by the sensor Before it's cleaned, take some good pictures of it, both sides, and post those with your question. That way we can hopefully "see" where there might be a damaged component etc.

Adding images to an existing question — oldturkey03
Certainly will do, give me some time. (I still have nightmares about that keyboard's ZIF connector...)

Do you know which temperature sensor TP0P is referring to? — Seymor Butz
@breathlungs that is your Platform Controller Hub sensor and if I remember right it is on the top side of teh board (The side that faces the keyboard :-) — oldturkey03
@oldturkey03 photos added to post, along with an edit of some of additional steps tried. When looking at the board, I'm not sure what to look for, but the only thing I see is some slight discoloration on the airport cable (though disconnecting that made no difference) and then possible something on the DC-in board, but it could also be just dust. I cleaned both but no dice. — Seymor Butz
I know it's an older machine but these 2010-2012 MBPs are great, and I'm not in a position to buy a new one, so hoping to repair it it. Maybe some greys like @danj can take a whack at it. 🙂 — Seymor Butz
This was helpful. Inspecting there, found some corrosion, I guess, pretty much right around that area (kind of hard to tell without magnification, and on a black board...), removed the small heat sink, toothbrush alcohol cleaned, in several places that looked similar. Ran EFI ASD again: this time only Th1H is failing. An improvement. Though in the OS I still see the Ts0S failing too

Th1H... "Right fin stack proximity" ... Now where is that... OK found it, it's Q5520, and that area of the board is spotless, it's connected to the same U5520, so maybe I can do a once in over and inspect traces around there... implying I'd even be able to find them lol

Next is the memory proximity, Ts0S. I believe this is Q5510.

After finding them, does this sensor failure mean the problem is at this particular part on the logic board, or rather on any one of the traces leading to/from it? — Seymor Butz
After a more vigorously toothbrush ISO scrubbing. I now have a full speed MBP with all temp sensors in working order. Thanks.

I got 99% iso and just went at it with the toothbrush like a dentist gone postal.

It worked!

edit: 30 minutes later -- and now they're failing again. *grabs toothbrush...* — Seymor Butz

MacBook Pro 13" Unibody Late 2011

Water spill, thermal sensor, kernel_task, oh no.

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