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macbook air 820-00165 stuck 0.284 mA

werickoliveira

werickoliveira

New member
Hello, I have a MacBook air 13 a1466 2017. which had liquid damage, I corrected the u7600 which was oxidized and the machine started up again, after 10 days it started to show a problem again without turning on, freezing at 0.284 mA, I changed the u7600 once which had liquid damage, but did not start working again, remained stuck at 0.284 mA.

measurements taken.
PM_SLP - 0.0V
PPBUS_G3H - 8.56v
PPBUS_S5_HS_COMPUTING_ISNS - 8.56v
PPBUS_S5_HS_OTHER_ISNS - 8.56v
PP3V42_G3H - 3.42v
PPVRTC_G3H - 3.3v
PP5V_S5 - 5v
PP5V_S4RS3 - 5v
PP5V_S0 - 5v
PP3V3_S5 - 3.3v
PP3V3_S4 - 3.3v
PP3V3_SUS - 3.3v
PP3V3_S3 - 3.3v
PP3V3_S0 - 3.3v
PP1V8_S3 - 1.8v
PP1V2_S3 - 1.2v
PP1V05_SUS - 1.15v
PP1V5_S0 - not present
PP0V6_S0_DDRVTT - not present
PP1V05_S0 - 0.24v
PP1V05_S0SW_PCH_HSIO - 0.24v
PPVCC_S0_CPU - not present
PP1V05_S0 - 1.68V
I would like to remind you that the CPU is heating up.

What do you recommend me to do? I'm a little lost on what to check.
 
2informaticos

2informaticos

Administrator
Staff member
Fist check diode mode to ground on the missing S0 voltages.

As you get 3V3/5V_S=, PM_SLP_S3_BUF_L is OK.
Check if R8185 is good.
Also post U7870 voltages.
 
werickoliveira

werickoliveira

New member
I checked the s0 pins.
PP1V5_S0 - 0.327
PP0V6_S0_DDRVTT - 0.092
PPVCC_S0_CPU - 0.005

* R8185 has 0 Ohms

* U7870 voltages

pin 1 -> 0V - diode 0.327
pin 2 -> NC - OL diode
pin 3 -> 0V - 0.441 diode
pin 4 -> 0V - 0.346 diode
pin 5 -> Ground - diode 0
pin 6 -> 0.829V - 0.324 diode

One more thing, when I referred to PM_SLP in the answer above, I would refer to PM_SLP_4_L, I ended up not writing until the end, sorry. follows the voltage of PM_SLP_S3_BUF_L 0v

and one more detail now, I measured ppbus_g3h again and now I only have 2.3V. Returning this information is important because yesterday's measurement was normal, for some reason I don't have normal voltage now.

When I remove the f7140 I have the correct voltage on pin 1 8,59V

I followed the mesh until the Q7630, when removing the ppbus voltage it returned to normal.

* U7870 voltages after remove Q7630 after replacement

pin 1 -> 1,5V
pin 2 -> NC
pin 3 -> 3,2v
pin 4 -> 1,79V
pin 5 -> Ground - diode 0
pin 6 -> 3,3v


my consumption dropped to 0.045mA already disregarding the cable consumption
 
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2informaticos

2informaticos

Administrator
Staff member
How did you get 3V3/5V_S0 with 0V at PM_SLP_S3_BUF_L???
Please, post accurate information from the beginning.

"pin 1 -> 1,5V"
That means PM_SLP_S3_BUF_L is present.
What about ALL_SYS_PWRGD level?
 
werickoliveira

werickoliveira

New member
*changing the Q7630, I removed a fault that was in ppbusg3h after that I obtained the voltages

*ALL_SYS_PWRGD -> 0,062V / diodo 0,386
 
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