820-2936 turns the cooler for 5 seconds and stops.

[iClub]

Ola amigo, this mac had oxidation in components below the SMC on the other side of the board, replace, in tests the mac turns on the cooler and stops. I checked the PM_SLP_S4_L signal stays high 3.3V and then it stays 0v. it already replaces the u2800, but I didn't succeed.

Voltage: PPbus_g3h: 12.58V; pp3v42_g3h.
diode scale:
SMBUS_SMC_BSA_SCL 0.540V
SMBUS_SMC_BSA_SDA 0.538V

 

[2informaticos]

Reball SMC, if detected corrosion close to it...