macbook a1707 820-00928

[mon2]

You have 20v so believe the cd3215 are working.

[Stephen]

Post U7650 basic voltages:
23,=12.64V
22,=3.3V
12,=3.4V
13,=1.99V
29,=5V
21.=3.4V

SMC_PM_G2_EN comes high? = 3.4 V
Are you using 87W charger? = used 100W

For A1707 models You must use an exact 87W OEM Apple brick. For some odd reason the board does not like anything less or more. Hope this helps.

[PITERPENY]

For A1707 models You must use an exact 87W OEM Apple brick. For some odd reason the board does not like anything less or more. Hope this helps.

I tried the Apple 87W unit, it didn’t work! but thanks for the tip. I still have 20v and 0.000a stable

[PITERPENY]

maybe this board also has problems with the thunderbolt firmware?

[mon2]

You have 20V so not TBT linked IMO. Do consider a BIOS reflash but backup the original. PS: Do you have a warehouse of boards in your facility? Nice to have if you do

[PITERPENY]

oh yes, I have a whole box of boards of any kind! with my knowledge there are more and more of them! I'll try to upload a bios from a donor! If it doesn't work, I'll ask you)

[PITERPENY]

so I rewrote several options for the OS, including with a clean region, the board consumption is still = 0V, substitution from other boards also did not give anything! I installed a BIOS chip from this board onto another one and it starts it up! Apparently we need to look for the reason elsewhere (

[mon2]

Review and share the details from post # 19.

[mon2]

What is the voltage to ground of the following points? Given that your PPBUS_G3H is boosted, these lines should be ok but do confirm it. Along with the current PPBUS_G3H voltage to ground.

SMBUS_SMC_5_G3_SCL
SMBUS_SMC_5_G3_SDA

After you attempt to power up, what is the current draw ? Stuck @ 0A ? What is PPBUS_G3H? Stable voltage till you unplug the adapter?

[mon2]

Is the other unit that is working with a battery? Test this one with a battery.

[PITERPENY]

I fiddled with it for 2 weeks, replaced the PCH (U1100) and the MacBook came to life. therefore, if A1707 consumes 0.000A, I think 99% of PCH(U1100) should be replaced.

[mon2]

Very nice! Personally would have tossed it. Share the details of the donor PCH. Anything special or just replaced from another A1707 donor board?

[PITERPENY]

I took it from the same donor board). but since it’s green I think it’s a product from Intel)

[mon2]

Awesome! Thanks for the updates and pix. For this series, I believe they are all from Intel. Later models have the Apple silicon.