820-01598 No power

[tlough75]

Hi, so on the bench I have an 820-01598 that is not powering on. I have 20V @ 40mA on my USB-C ammeter and PPBUS_G3H is 12.62V and PP3V3_G3H is present at 3.3V. I know since i have 20V at the charger the USB-C controllers are ok, and I have my G3H rails, I don't think my ISL is bad that probably has nothing to do with it I not sure what to look at next.

 

[2informaticos]

Do you get 3V3_S5, a pulse at least?
History fault?

 

[tlough75]

I have PP3V3_S5, Steady. No history, the owner said it just stopped working. No liquid, no dorps damage. I am trying to see if they tried to update OS.

 

[2informaticos]

Try DFU mode, just in case...

 

[tlough75]

Is that where I need to use another Macbook?

 

[2informaticos]

Yes.
Be aware, must have the same macOS version as the one installed in the T2 machine.