[SOLVED] 820-2936-B PM_SLP_S4_L problem

[macfix]

Hello Everybody

I m working on liquid damaged 820-2936-B SMC area around, cleaned by ultrasonic now fan spin and turn off loop.

Stable voltages :
PPBUS_G3H 12.5V
PP3V3_S5 3.3V
PPVRTC_G3H 3.3V

But PM_SLP_S4_L up 3v and down 0

Already replaced SMC and looked bad parts nothing changed, any idea for next step?

Thanks.

 

[SoloHarty]

PM_SLP_S4_L is created by the PCH not the SMC. what does U1800 look like?

 

[dukefawks]

U1800 will look like a PCH.

U2800 will be the first suspect here, replace.

 

[SoloHarty]

U1800 will look like a PCH.

 

[macfix]

thanks dukefawks and SoloHarty after replace U2800 and y2805 machine start to work

 

[larossmann]

For next time Y2805 almost never has to be replaced, if ever! But good to know it is solved.