​820-3476-a Green/orange light, pp5v_s5 low. Not booting.

[drewrox2009]

820-3476-a
very light blue corrosion around probe 106 area under the hard drive but does not look like direct water damge.


PPBUS_G3H 12.56v
PPBUS_S5_HS_COMPUTING 12.56v
PPBUS_S5_HS_OTHER5V 12.56v
PPBUS_S5_HS_OTHER3V3 12.56v
PPDCIN_G3H_ISOL 16.16v
PPDCIN_G3H 15.9v
PP3V42_G3H 3.425v
PPVRTC_G3H 3.425v
PP5V_S5 2.5v
SMC_PM_G2_EN 52.3mv


PP5V_S5 1.36k resistance to ground

beep across c1031 is this normal?
logic board looks really clean, liquid contact indicators are perfect.
I know there is a short on pp5v_s5 but i can't seem to find it.
Do you guys have any suggestions?


r7020 470k
voltage on r7020 on one side is 16.5v and on system side 14.8

 

[aprendiz]

Remove flex from J4800 and check PP5V_S5 again.....

 

[aprendiz]

Also check SMC_PM_G2_EN, it is needed to activate U7501, this signal comes from SMC.....