The larger of Apple's MacBook Air laptops featuring dual microphones and 802.11ac Wi-Fi connectivity.

321 Questions View all

Possible to bypass thermal sensors, or fix them?

Hi all,

Im having trouble with a water damaged macbook air. It is a 1.7Ghz i7 8GB RAM and apple have told me they won't fix it due to the water damage (gotta try at least!). It starts and runs but is slow due to the sensor being damaged as far as i can see. The sound and sd card reader also show faults on the apple hardware test but I'm guessing this is related?

I would really appreciate any help you can offer as id love to get it working again :-(

Answer this question I have this problem too

Is this a good question?

Score 1


After much faffing about, I am still no further forward. I have tried Reflowing the SMC incase the damage was related to that, and it hasn't made it better or worse. What i have noticed is that there is a very small corrosion mark on the logic board flex cable connector. The cable and I/O board have been replaced but offered no fix. Are there any thermal sensors on the I/O board and does the flexi provide charging or anything like that?

The macbook still has all the same issues, which look like they could all come from the same position hence the no sound. Can anyone provide me with any further advice? Thanks :-)


Add a comment

1 Answer

Most Helpful Answer

If you're skilled with small electronic/computer logic board soldering you could replace the sensors... otherwise the easy (but still advanced) DIY "fix" is to replace the logic board, or, have a vendor on ebay repair the board (not every step of a DIY project has to be done by you). I would not attempt to bypass a sensor - you will cook the CPU or VGC.

If this answer is acceptable please remember to return and mark it.

Was this answer helpful?

Score 3


I'm fairly skilled at soldering, do you know where The sensors are located or what they look like?

The battery is also not charging but it runs from the charger and battery, do you think this is all linked to one fix?

Thanks :-)


I do not know, many here can get their hands on schematic/repair manuals. If you post some pictures of the damage you may also find someone who can identify the part. There are a variety of sensors located around the logic boards. The Mark I Eyeball and a magnifier looking for corrosion, burn marks or swollen componentsf is your best bet at locating damage. Since it boots you may be able to run Apple Diagnostics to find out which sensors failed.


The board looks absolutely perfect, no damage, no corrosion or nothing. I cleaned it asap but it did this. I have been tempted on bathing it in IPA for a short while to see if there's any corrosion under a chip that I'm missing such as the SMC.

I will do the apple diagnostic and feedback what it says, thanks for your help :-)


PPP007 & PPP002 (relating to the power adapter), PFM006 (SMC Fault), PPF004 & PPF003 (Fan fault), PPN001 (unknown, can't find it), VDC001 (SD Card Reader Fault), VFF001 (Audio Fault). Is it possible that all these are linked to corrosion under the SMC or one common factor? There is an aweful lot wrong and the board by eye is perfect.


Yea - Time and money - IMHO it would be easier to sell the logic board as is (describe damage) for a few $ on e-bay, take that $ plus what you'd spend on parts (if you can even get them... probably have to buy a damaged logic board an pull them off) and just put in a replacement logic board.... or send it to a service on e-bay that repairs logic boards for you... do the math and calculate the cost effectiveness of each possibility.


Show 4 more comments

Add a comment

Add your answer

JayT will be eternally grateful.
View Statistics:

Past 24 Hours: 3

Past 7 Days: 3

Past 30 Days: 8

All Time: 5,656