820-2936 - Green LED flashes

[Palhano]

I repaired it a month ago. It had oxidations on R5301/02, R3880/81 and failed SMC. Now it's back, I connect magsafe, the board turns on, LED turns green and turns off. Board remains on.

I've already tested it with another DC.

PPBus - 12.56v

I checked the R7051/52, R7021/22. They are OK. On U7000, pins 17/18 - 3.0ohm, 27/28 - 20ohm

Any suggestion?

 

[Palhano]

Yes, the card continues to function normally.

Continuity of the normal u6900.

It seems to be the SMC again. U6900 pins giving 0v.
U6901, pins 1 and 2 with 0.7v, pin 5 - 3.42v, pin 4 - 0v

 

[2informaticos]

Missing SMC_BC_ACOK?
Check continuity from U7000 to U6901.

 

[2informaticos]

Change U7000 and U6901.