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Sorry for the lack in information, this Mac boots fully with charged battery and I get 20V with battery installed but 0A so it wont charge, board alone takes 5V and 0.280A, T2 revive works all the way to the end but no change.
I dont even know where to start, but I just replaced U7000 and same thing.
All 4 CD3217 were replaced from same donor board that had 20V
Already replaced from donor board U2890 and UB090
UPC_I2C_INT_L is 0V Diode 426 with board alone
Just in case I2C_PWR_SDA/SLC 1.8V with correct Diode read
Diode and voltages
PP3V3_G3H_RTC_X 3.3V 460 Diode
PP3V3_UPC_**_LDO in all 4 ports 480 diode and 3.3V
PP1V5_UPC_**_LDO_CORE in all 4 ports 520 diode and 1.5V
Diode read on UPC_I2C_INT_L is on par with know good.
Checked for shorts around all CD3217s and all is fine, I have had this board for a while now and I am ready to give up unless you think I should check something else.
The problem is not on UPC_I2C_INT_L line; unless R5246 is bad (open), or have corrosion between pads of J3000, or JB200.
This line is used to report problems on USB-C power channels.
You may have just a bad resistor, or broken trace; possibly input ESD diode damaged also.
Check diode mode to ground on J3300 and JB500.
When working on battery, do you get USB activity on all ports?
R5246 ok
J3300 and JB500 are on par with known good board in diode mode
Mac only has USB activity in bottom left port (the one used for restoring) the other ports dont have voltage nor activity
Ok I have P5V_G3S missing and U3500 needs that in order to work, when I check U7650 I see that P5VG3S_EN_R missing, following that P5VG3S_EN is missing too as well as PMU_PVDDMAIN_EN and that only comes out of PMU, all AWAKE and SLPS2R signals are present, so far this is what I got, would that mean PMU is the problem?
PP1V8_G3S missing not shorted, U8220 has power but missing enable signal PP1V8G3S_EN
PP3V3_G3S missing too not shorted
Tried a new PMU with same result
In its case board does indeed still boots fully, 20V with battery connected but wont charge.
Left side has USB voltage and activity, right side is missing both, this gives me something to look for.
With battery alone no trackpad I still dont get voltage on those 2 coils (remember this board requires battery and trackpad to boot fully)
All my testing is done with new know working C ports