820-3115 b no green light

[andrespi]

this macbook not green light, not turn on fan
ppbus_g3h=12.6
smc reset_l=3.45
CHGR_ACIN=3.9v
SMC_BC_ACOK_VCC = 3.48
PP3V42_G3H =3.48v
PPCHGR_DCIN =16.22

 

[2informaticos]

Did you try known good DCIN board?
Post U6900 voltages.

 

[andrespi]

corrosion on u6900, which is better process, clean or change immediately u6900?

 

[2informaticos]

Remove it and clean all pads and traces.
Resolder it, if the pins are not damaged.
Check continuity from U6900 to the central pin of DCIN board.