A1706 No power

[madjid911]

Hello, I have a macbook a1706 (820-00923-A) that does not turn on, the 20v ubc triggers but no power consumption, no short and no liquid damage, PPBUS_G3H: 0V15 (16mohms no short), U7000 is well powered by the 20V, I looked at everything around the ISL9239 chip the resistors are good, so I replaced the chip twice but the result is the same, my skills stop there can you help me please?

[mon2]

What are the voltages to ground of the following points?

TBA_VDDA
TBA_VDDP

TBA_AUX_DET

TBA_CSI_P
TBA_CSI_N

SMBUS_SMC_5_G3_SDA
SMBUS_SMC_5_G3_SCL

[madjid911]

What are the voltages to ground of the following points?

TBA_VDDA
TBA_VDDP

TBA_AUX_DET

TBA_CSI_P
TBA_CSI_N

SMBUS_SMC_5_G3_SDA
SMBUS_SMC_5_G3_SCL

TBA_VDDA : 5V12
TBA_VDDP : 5V12

TBA_AUX_DET : 4V94

TBA_CSI_P : 19V77
TBA_CSI_N : 19V77

SMBUS_SMC_5_G3_SDA : 3V27
SMBUS_SMC_5_G3_SCL: 3V27

[mon2]

These look ok to me. Flux and remove the fuse @ F7000. Power up again with the adapter. What voltage do you measure at the removed fuse F7000, pcb pad #1 = ISL / producer side of this power rail.

[madjid911]

These look ok to me. Flux and remove the fuse @ F7000. Power up again with the adapter. What voltage do you measure at the removed fuse F7000, pcb pad #1 = ISL / producer side of this power rail.

F7000 PIN 2 : 0V700 increasing
pin 1 : 0V