820-01949 draws 20volts and 0.06mA

[Soji]

PPBUS_G3H 12.63 V
PP5V_G3S 5.1 V
PP3V3_G3H_RTC 3.3 V
PP3V3_G3H 3.3V
PP3V3_G3S 3.3V
ALL SSD rails are present and the PMU LDO'S. Try to restore with apple configurator 2 and got this error:
The System cannot be restored on this device.

Unexpected device state 'DFU' expected Recovery' (Probably forced into DFU mock externally) [com.apple.MobileDevice.Mobile Restore

- OXFAE (4014)]

 

[2informaticos]

Target machine appears directly into AC2, without typing DFU keys sequence?

 

[Soji]

No..until I press the DFU combination keys.

 

[2informaticos]

Any SSD voltage present?
If not, check diode mode on its power rails.

You can try to reflash U4770 and see if complete DFU after that.