Hi everyone
I have a problem with this laptop that won't turn on.
The +VCORE is not present and doing some measurements on the ISL95859 I notice this:

VIN present 19.5V
VCC present 5V
VR_ENABLE present 3.3V
PWM_A present 2.5V
FCCM_A not present
PWM1_B present 2.5V
PWM2_B present 2.5V
FCCM_B not present
PWM_C present 0.32V
FCCM_C present 5V

In these conditions should the ISL95859 works and therefore enable the FCCM_A and FCCM_B pins or do I have to check other lines for it to be enabled?
Maybe the ISL95859 is dead?
I add the very very similar schematic
​​​​​​​
Thank you