MacBook Pro A1706 - Stuck at 5V and 0.09A

[mon2]

Share the voltage to ground of the following:

PP5V_S4
PP3V3_S5
PP5V_S4_P2V7NAND_LB
PP3V3_2V7_NAND_VCC ; measure @ L9400

[BMCappelletti]

Share the voltage to ground of the following:

PP5V_S4
PP3V3_S5
PP5V_S4_P2V7NAND_LB
PP3V3_2V7_NAND_VCC ; measure @ L9400

PP5V_S4 - 0V
PP3V3_S5 - 3.3V
PP5V_S4_P2V7NAND_LB - 0V
PP3V3_2V7_NAND_VCC ; measure @ L9400 - L9400 has P2V7NAND_SW and P2V7NAND_R. 0 volts. Any point near it, where PP3V3_2V7_NAND_VCC would actualy be, is also 0V.

[mon2]

Measure voltage to ground (carefully) of P5VS4_EN @ U7650 which is used to enable PP5V_S4.

[BMCappelletti]

Measure voltage to ground (carefully) of P5VS4_EN @ U7650 which is used to enable PP5V_S4.

Zero.
Measured directly on the pin and on a test point.

[BMCappelletti]

Other other idea?

[mon2]

Do you have the trackpad attached or disconnected? If it is attached, disconnect it and test again.

[BMCappelletti]

Do you have the trackpad attached or disconnected? If it is attached, disconnect it and test again.

I have it disconnected. Only the board. Nothing else.

[mon2]

Review the power rails for your board here:

Power Rail List - LogiWiki

Note all that are not present.

[BMCappelletti]

Review the power rails for your board here:

Power Rail List - LogiWiki

Note all that are not present.

All of these are missing.

PPVCC_S0_CPU
PPVCCSA_S0_CPU
PPVCCGT_S0_CPU

PPVCCIO_S0_CPU

PPVCCEDRAM_S0_CPU

PP0V6_S0_DDRVTT
PP0V6_S3_MEM_VREFDQ_A
PP0V6_S3_MEM_VREFCA_A
PP0V6_S3_MEM_VREFDQ_B
PP0V6_S3_MEM_VREFCA_A

PP1V8_S4
PP1V8_S3
PP1V8_S3_MEM
PP1V8_S0

PP1V0_S3
PP1V0_S0SW

PP5V_S4
PP5V_S4SW
PP5V_S4SW_ISNS
PP5V_S0
PP5V_S0_KBD

PP3V3_S4
PP3V3_TBT_X_S0
PP3V3_TBT_T_S0
PP3V3_S4_BT
PP3V3_S4_TPAD
PP3V3_S4SW_SNS
PP3V3_S4_MESA
PP3V3_2V7_NAND_VCC
PP3V3_S4_SOC_PMU

[mon2]

For each power rail that is not to the expected voltage range or is zero volts, measure their resistance to ground. A good idea to locate each inductor onboard and perform the same resistance measurement to ground. Report any off measurements which may be due to a shorted capacitor or something else. A low resistance will cause an excessive current draw and this will be sensed by the buck regulator or the current sense amplifier circuits and then will result in powering down that rail. Music stops playing, party is over, everyone has to go home.

[mon2]

Check that SMC_RESET_L and SMC_USBC_INT_L are properly pulled up to 3v3.

[BMCappelletti]

I can't believe it.
The Macbook came with an original USB-C charger, which was showing 5V when connected to my meter. So I used another original Apple charger I have. Same story.
Earlier today I found a Anker USB-C charger I have and I thought "why not?". I plugged in and... 5V... boom! 20V! And the board started.
Which means both original chargers are not ok. And I wasted my time and yours.
I'm really sorry about that.
The laptop was freezing and rebooting, but it was because of a swollen battery. I disconnected it and it's working fine for hours. Now I need to by a new charger (or not) and battery.
I'm really sorry about that.