820-01700-A - No power - PPBUS_G3H shorted

[ronaldo]

Hi.
I have this board that came in for no power. No liquid, but very dust inside.

I found a short on PPBUS_G3H and it leads me to U9580 small burn mark on top. So removed and short on PPBUS_G3H is gone.
Now it has the following shorted lines:
- PP2V5_NAND_SSD0
- PP1V8_SSD0
Both readings in diode mode are 0

U9500 removed and no difference.

When injecting 1V on PP1V8_SSD0 the NAND U9100 gets warm near pin 12. Also, I can see a warm area under U9400.
I removed L9580, L9581, C9590, C9592, C9591, C9587, CC9F0, CC9F1. Still shorting on those lines.

Please can you advise me if this is a NAND dead case?
If so, is it possible to replace the Nand individually, or does it need all to be replaced same time?
Thanks in advance.

 

[2informaticos]

Looks like fried NAND chip.
We have several threads about changing NAND on the forum; unfortunatelly, nobody left a positive feedback.
Peoples claim all NANDs must be changed; from donor board, same position.