Logic board - Voltage on all rails EXCEP 5V - Maybe ISL95828HRTZ?
Took this computer apart, trying to fix it myself.
Computer will not show ANY signs of life on the outside.
USB-C with charger on it shows 20V but minimal (almost 0) amps.
I started probing the different voltage rails on the mother board.
PPBUS_G3H : 13.13V
PPBUS_G3G_CPU: 13.3V
PPDC_IN_G3H: 20V
PP3V3_G3H: 3.4V
however…
All the 5V related lines are 0 V all the way back to the PPV5V_S0.
PPV5V_S0: 0V
PPVCCPCH_S5G: 0V
PPVCCSA_S0G_R: 0V..
First time trying to fix my own MacBook logic board. Curious if anyone has suggestions to narrow down the issue.
it seems to me I may have a bad U7100 part (aka ISL95828HRTZ ) DCDC buck converter? Just my best guess.
Appreciate any suggestions!