820-00850 dead no power don't work

[lincev]

Hello, I am looking for someone with experience in this board and who would be so kind to help. Thanks in advance.

The board does not have any liquid damage or burned components (appreciable with a microscope)

I've looked at other posts about this model but I don't know where to start. I'm also attaching a photo of the test showing that it doesn't receive amperage.

 

[2informaticos]

Post PPBUS_G3H and 3V3_G3H_RTC voltage.
Is the machine recognized in DFU?

 

[lincev]

Hello again, sorry for the delay but been sick from covid.

without battery:

PPBUS_G3H= 6.0v-10v-12v (constantly changing)
3V3_G3H_RTC= 0,00v-1,00v-3,33v (constantly changing)

with battery:

PPBUS_G3H= 8.0v-10v-11v (constantly changing)
3V3_G3H_RTC= 3.36v

DFU mode with apple configurator 2 I have not achieved....

 

[2informaticos]

All USB-C ports have exact the same behavior?
Stuck at 5V, not pulsing, or restarting ampmeter?

 

[lincev]

yes all usb-c same behavior

stuck ay 5v? this I don't understand sorry

 

[2informaticos]

Your picture shows 5.11V; fixed (stuck), or restarting???