820-01700 No CPU VCORE

[grmacs]

This board had multiple small spots of liquid contact in these areas, most were minor and just noticeable liquid but looks not significant corrosion to solder joint/pad: U7210/20/30 (minor), CB701 (corroded and replaced), R4922 Corroded and replaced, TPB206 pad is gone, U8110 (minor) , above u8800 (minor), UA870 (minor),

PVCCIO_PGOOD is 1.7V
All_SYS_PWRGD is 1.8V
Major coils show voltage except: PPVCCGT phase1/2, cPU CORE 1/2/3,and bklight coil

THis mac will show in DFU mode and tried both revive/restore: Apple Controller not booted

Board starts from both charger or battery.

 

[2informaticos]

VCCGT will not appear until high graphics load is detected.
VCORE must appear on boot, of course.
Bad news about liquid sign near VCORE power supply.
CPU can be damaged now.

PCH, T2 (including BIOS) and CPU itself, all are involved in VCORE generating.
You may have corroded trace, or component, accumulated crap under some BGA chip.