820-01814 error 4014. NAND?

[ajdoc]

Cant find and corrosion on the board.
At the start I had 5V from charger.
Tried to "revive" in DFU and had error 21.
Tried restore and had error 4014.

I reflashed SoC ROM and have 20V from charger but still cant restore it.
Error 4014.

Looks like faulty NAND?

 

[2informaticos]

Any history available?