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I replaced u6900 too and some bad caps, I don't have green light yet
SMC_BC_ACOK: 2v fluctuating (u6901 pin 1 and 2)
ADAPTER SENSE: 3,46V
u7000- CHGR_ACIN: 4V
So probably is the SMC isn't it?
How can I get rid of the SMC glue properly?
Edit: I have measured PPVIN_SW_T29BST and I got 0V
PP5V_S5: I got 1,4V only SMC_PM_G2_EN: 0V
Q: ok thanks, reflow here doesn't work? ( I answer to myself)
A: No, I already did, it gave me green light for a few seconds,also I have almost all power rails, but it is like BGA reballing or reflow...is BS the chip is gone.
Waiting for a new one.
I have donors board but no smc stencils anyway I ordered reballed smc.
Q: Do you work always with reballed smc nowadays or do you reball smc from donor boards sometimes?
Q: Last question: I´ve read how to bypass the smc to test the board, how can I do that?
Hi, Im still waiting for the preballed smc that I bought, but I´ve been reflowing the smc because this board was with liquid damage around the smc. but not directly, now what I have is a green light for 12 seconds then turns off then 12 seconds later goes on...and keep doing it. Does the smc do that? Could be something related with the clock signal?
I´ve checked that in PP1V8_S0 I got nothing but I have green light for few seconds. No fan spinning. Pads shorted nothing happens
Ok so now I have the smc I already change the smc for a new one, reballed, and the board do the same. Goes on....and then off again green light.
What I have seen is that when I plug the charger with the battery at the same time it doesn´t appears the green light only 3 seconds instead of 8 seconds with only the charger.
I suspect must be something related with the q7055 the pin 4 with battery is steady 4.50V while when I plug the charger in is 12.50V the same pin in q7055
Do i have to replace it?