[SOLVED]820-3115 fan spin 1sec

[aurel476]

Board was liquid damage smc area and spi area,

begin no ppbus i replace smc now i have 12.60V, PP3V42_G3H fine

after PPVRTC_G3H pulse, replace U2600 and cleaning area now 3V stable

now fan spin 1 sec and stop loop

already check spi terminaison,

R7402/03 fine

ALL_SYS_PWGD 0V when fan no spin

i noticed pin 6 and 5 when fan spin voltage decrease 1V and up 3V when fan stop (other pin voltage stable)

already checked without SPI diode mod red probe to gnd and black to pins

any idea ?

 

[dukefawks]

Is CPU Vcore present when fan pulses?

 

[aurel476]

solved with ultrasonic cleaner probably crap under pch