macbook A1707 820-0928

[ipetro]

won't turn on
20V/0A all 4 ports have the same behavior on all sides
PPBUS_G3H=12.65V
NO SHORT CIRCUIT! COIL READINGS ARE NORMAL

 

[2informaticos]

Any other basic voltages checked?

 

[ipetro]

yes of course here are my basic measurements
PPBUS_HS_CPU=12,64v
PPBUS_HS_GPU=12,64v
PPBUS_HS_OTH5V=12,64v
PPBUS_HS_OTH3V3=12,64v
PPBUS_S4_HS_TPAD=12,64v
PP3V3_G3H=3.4v
PP3V0_G3H=3.0v
PPVCC_S0_CPU=0v
PPVCCSA_S0_CPU=0v
PPVCCGT_S0_CPU=0v
PPVCCIO_S0_CPU=0v
PP1V2_S3=0v
PP1V2_S3_CPUDDR=0v
PP1V2_S0SW=0v
PP0V6_S0_DDRVTT=0v
PP1V8_SUS=0v
PP1V8_S4=0v
PP1V8_S3=0v
PP1V8_S3_MEM=0v
PP1V8_S0=0v
PP1V0_SUS=0v
PP1V0_S3=0v
PP1V0_S0SW=0v
PP3V3_S5_T139=0.012V
PP3V3_S4_SOC_PMU=0.004V
PP5V_S0_T139=0V
PPVCORE_S0_GPU=0v
PPVDDCI_S0_GPU=0v
PP1V5R1V35_S0_GPU_MEM=0v
PP1V5R1V35_S0_GPU_IC=0v
PP5V_S5=5V
PP5V_S0=0V
PP5V_S0_KBD=0V
PP1V8_GPU=0V
PP1V8_S0_GPU=0V
PP3V3_S0_GPU=0V
PP3V3_S5=3.3V
PP3V3_SUS=0V
PP3V3_S4=0V
PP3V3_S4_T151=0V
PP3V3_S4_BT=0V
PP3V3_S4_WLAN=0V
PP3V3_S4_TPAD=0V
PP3V3_S4SW_SNS=0V

 

[2informaticos]

These are more than basic; many unnecessary.

Do you get 3V3_SUS?
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.

 

[ipetro]

PP3V3_SUS=0V
if you short SMC_ONOFF_L to ground, the voltage drops on PM_PWRBTN_L from 3.3V to 0.334V

 

[2informaticos]

Check for pulse at PM_SLP_S4_L, at same time.

Also check PM_DSW_PWRGD, PM_BATLOW_L and the 3 PCH's RTC (DC) signals (page 12).

 

[ipetro]

PM_SLP_S4_L=0v no pulse
PM_DSW_PWRGD=3.4V
PM_BATLOW_L=3.3V
3 PCH's RTC (DC) signals (page 12).I hope you meant these lines
PCH_INTRUDER_L=2.83v
PCH_SRTCRST_L=3.08v
RTC_RESET_L=3.08v

 

[ipetro]

I forgot to mention that there were traces of liquid (oil) in the area of the u7650 chip

 

[2informaticos]

PM_SLP_SUS_L comes high?
If not, PCH may be bad.

 

[ipetro]

I have a consumption of 20 V and 0.000A! Does PCH (U1100) affect this? Or do I need to figure out the power supply circuit first?

 

[ipetro]

I turned off f7000 and f7001 and my consumption is stable at 0.000A

 

[ipetro]

PM_SLP_SUS_L=0v

 

[2informaticos]

Looks like bad PCH.
Just in case, check SMC_ADAPTER_EN too.

 

[ipetro]

ok I'll replace the PCH

 

[ipetro]

It was a long and difficult repair, but you were not mistaken. After replacing the PCH the MacBook works great. thanks for the help)