820-01700 no PPVCCGT_S0_CPU

[JdYoda]

Hello!

Mac A2141 turns on with battery, there is a chime, but PPVCCGT_S0_CPU is missing. No image, no backlight. USB activity is present, caps lock reacts
Without battery doesn't turns on, 20v, 0.04a
DFU restoring sucsessful. In SMC bypass mode doesn't start
Before was short on PP2V5_NAND_SSD0, C9586 was shorted. After replacing the cap - short is gone, 2.5v is present.
Voltage for U7410 and U7420 are present, but on coils L7410 and L7420 is 0v, resistance on both coils is 3 Ohms
Try to replace FDMF5808A or CPU is dead?

 

[2informaticos]

Already explained thousand times on the forum.
iGPU core voltage ONLY appears when high graphics load is detected.

Try to read and take daily notes from all threads; do not limit at your ones.
You gain time finding answers in your notes, instead of expecting new ones.

Did you test external video?
Any history fault available?

 

[JdYoda]

Sorry, i do have note book, but never faced missing cpu vcore before.

External video is missing, customer says that laptop just didn't turn on in the morning

 

[2informaticos]

Do not make confusion between CPU core and iGPU core!
iGPU core gets power from CPU core power supply, at low graphics load.

Disconnect internal LCD and check again external video.

 

[JdYoda]

With disconnected LCD external video also missing. Laptop is on, i can hear a sound when i plug in a charger.

 

[2informaticos]

If Caps Lock reacts, then board boots.
Missing both internal/external video, can be iGPU problrem.
Just in case try revive in DFU; even restore, if no data needed.