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I'm certain that my Palm rest temp sensor (aka TS0P) is faulty as I can see the reading from iStats as -128, which fires up the fan speed to max and kill CPU power and Wi-Fi
According to what I read; this sensor is in the cable of the trackpad. Can you confirm this is the case?
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Guys I solved the problem!
It was !&&* of a 8 months of searching and debugging. I wrote a post about it here: https://addaxsoft.com/blog/dyi/fixing-fa...
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Hello, I really need to check you solution but the website doesn not work. Can you reply? Thank you!!
Here the same.
Looking ways to disable the trackpad temp sensor.
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Replace the trackpad cable (usually people sell the cable with the trackpad, not the cable on it's own).
If there is an issue with the cable, or the MacBook doesn't detect a trackpad plugged in, the fans will spin up since it has no reading from the sensor.
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actually I found the cable only on aliexpress for 10 buks, but it wasn't the one causing this issue!
So what was the issue?
And did You ever managed to bybass the sensor?
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Try to unplug the webcam, wifi, Bluetooth and trackpad cable and see if that makes the temp go down,
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it gave the same crazy reading of -128 when I unplug it!
check resistor R5270 and R5271, 1k ohms each one, if is not 1k replaced. You can check with Volts it should be 3.3v on both sides of each resistors.
sorry for a question: on one end of the R5271 I don't have 3.3V but 0V how can I go back to the solution? The resistance is 1K but from the side towards the U4900. Thank you very much
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for those that removing TRACKPAD FLEX from connector (J5800) and the issue is still there, remove CAMERA FLEX too, the SMBUS_SMC_A_S3_SDA goes to camera connector (j3402) pin 4 and SMBUS_SMC_A_S3_SCL pin 5.
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I know this is old but wanted to comment incase someone else stuck with this issue in 2023.
This fixed it for me. The camera cable was the issue.
I opened my MacBook Pro 13" 2011 model for cleaning and I snapped the camera cable. I forgot to remove the cable head from the socket, and reassembled the device, and notice that it is running very slow. The cpu was throttled to 0.7ghz. Couldn't even boot the os to home screen.
I was about to give up when I found this post, and this comment, amd remembered that I left the cut camera cable in the socket. When I removed it everything went back to normal.
Thank you.
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note: I've tried to unplug the whole trackpad, same thing. the temp is still -128
AKZ さんによる