820-00165 Fan full throttle but CPU frequency normal

Sr. Robot

Member
Hi, got an 820-00165 that did not turn on and had liquid damage in the U1930 area, components replaced and now it boots but fan goes full throttle after Apple logo loading bar is more than 70% and into the OS. Chant be changed with any fan control software.

All temperature sensors are below 40 C.
Mac is a little slow but nothing close to CPU 50% throttling.
Trying to use camera gives the temperature warning and doesnt work

Replaced U6010 just in case, no change.
R6065, R6060, R6061 all good measurements
Replaced fan just in case, no change.
Tried another SSD just in case, no change.
Disconnecting the camera cable does nothing.

Diode mode measurements:

FAN_RT_PWM = 0.800 (good board 0.820)
SMC_FAN_0_CTL = 0.670 (gb 0.683)
SMBUS_SMC_1_S0_SDA = 0.430 (gb 0.440)
SMBUS_SMC_1_S0_SCL = 0.450 (gb 0.450)
 
Last edited:

2informaticos

Administrator
Staff member
Try with preinstalled USB macOS.
Disconnect internal SSD for test.

Did you try another LIO and trackpad board/flex ?
 
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