Macbook Air 820-00165A No green and orange light

[1phone.cl]

Hi friends i have a Macbook Air that does not turn on, it does not have liquid damage.

F7140 voltage 8.1V present

 

[2informaticos]

First, check SMC_RESET_L; post U5110 voltages.

Do you get 3V3_S5/SUS?

 

[1phone.cl]

SMC_RESET_L 3.3v

U5110
PIN 1 3.4V
PIN 3 3.4V
PIN 4 2.7V
PIN 5 3.3V
PIN 6 3.3V
PIN 7 3.4V
PIN 8 3.2V

3.3_S5 0v
3.3_S5/SUS does not appear in schematic Diagram

 

[2informaticos]

"3.3_S5/SUS does not appear in schematic"
Really???
What about 3V3_S5 AND 3V3_SUS then?
We use such notations since years on the forum.

"3.3_S5 0v"
How did you "extract" it and didn't see 3V3_SUS in that expresion?
Put some logic on your job.

SMC_PM_G2_EN comes high?

 

[1phone.cl]

Sorry, i got a little confused since i don´t have much experience repairing mac and i literally searched for the line you asked me for.

I made the measurements on the lines you asked me to

3V3_S5 0v
3V3_SUS 0v

SMC_PM_G2_EN 0V

 

[2informaticos]

SMC not running then.
Try changing it; reball first, just in case.

 

[1phone.cl]

ok, i changed the smc ic and now the lights turn on green and then orange without a battery connected, the fan does not start either

 

[2informaticos]

What about 3V3_S5/SUS?

 

[1phone.cl]

3V3_S5 Present
3V3_SUS Not Present

 

[2informaticos]

Missing PM_SLP_SUS_L signal?

Post PM_DSW_PWRGD, PCH_DSWVRMEN, PM_BATLOW_L, PM_RSMRST_L and the 4 PCH's RTC signals.

 

[1phone.cl]

i dont have oscilloscope but with multimeter show
something when i conect the power wire and keeped 0V
so i assume the signal PM_SLP_SUS_L its ok

PM_DSW_PWRGD 3.4V
PCH_DSWVRMEN 3.2V
PM_BATLOW_L 3.3V
PM_RSMRST_L 0V

RTC_RESET_L 3.3V
PCH_SRTCRST_L 3.3V
PCH_INTRUDER_L 3.0V
PCH_INTVRMEN 3.2V

 

[2informaticos]

"i assume the signal PM_SLP_SUS_L its ok"
Can't you post the voltage here???

 

[1phone.cl]

i told you keeped in 0V
PM_SLP_SUS_L 0V

 

[2informaticos]

Why do you think is good then???
Stop making wrong assumptions!

Which donor board did you get the SMC?
Are you sure is properly soldered?
If yes, then you have PCH issue.
Just in case, heat it with quality flux; to burn eventually accumulated crap underneath.

 

[1phone.cl]

Thank you for your help, i make the heat with quality flux and now its working.