820-01598 5v

[Kyle93]

Arrived with liquid damage primarily in U6903 area. Replaced U6903 PPBUS_G3H 12.30V Meter is cycling on and off to 5v 0.25

PP3v3_G3H_RTC 3.3v

PP3v3_UPC_XA_LDO 3.3v

PP3v3_UPC_XB_LDO 3.3V

PP1V5_UPC_XB_LDO_CORE 1.5V

PP1V5_UPC_XA_LDO_CORE 1.5V

PP1V8_SLPS2R 1.8V

Checked on another mac and its currently not in DFU mode. No liquid damage anywhere around U3200/U3100

 

[2informaticos]

USB-C ampmeter goes on/off, or just current indication varies 0-0.25A?

Check if all AWAKE and SLPS2R voltages are present; the small coils around U7800.
If yes, it should go into DFU.

G3S and SSD voltages come on?

 

[Kyle93]

USB-C ampmeter goes on/off

all AWAKE and SLPS2R voltages are present

0V G3s and SSD voltages

 

[2informaticos]

The mentioned onboard voltages fluctuates at same time with USB-C ampmeter?
Check what happens connecting charged battery.

 

[Kyle93]

Yes, onboard voltages fluctuates at same time with USB-C ampmeter.

When a battery is connected, the meter does not come on at all, if it does its only for 1-2 seconds. Meter is on around 10 seconds without battery.

 

[2informaticos]

There must be something more affected by corrosion.
You can't enter DFU mode if USB-C voltage cycles on/off.

What voltages do you get connecting a charged battery?

 

[Kyle93]

I do not have a spare charged battery for this model. Any other suggestions or just order a battery for this repair?

 

[2informaticos]

Maybe is not the battery in this case, but should be good to have a tool to discard it.

One moment, please...

The tester worth the money and you can purchase later the reset license.