Question Emmc module broke during formatting

Initially, I apologize for my English. I'm using google translator.

Well I installed an Sx core on an Arista V1 Switch.
When trying to perform the NAND backup procedure when it reaches 20%, it accused the error 00fffd4e by the Sx OS System, however the backup of boot0, boot1, was done successfully.
In several attempts, I managed to backup the sys partition of that same Switch, but when trying to backup the user in 12% it gave the same error.
I swapped and tried several microSD cards in both Fat32 and Exfat.
I changed the microSD module, I changed the modchip and the problem continued.
I even tested the backup by Hekate itself using SX OS (Options> payloads) and the errors appeared in the same place, in the case of Hekate the error was 00BEE000.
A few moments ago I tried to format the system, after about 2 hours in about 39% the Switch system gives the error 2002-3537 and when pressing the power button, the switch does not return to life.
The Sx core flashes blue and then a light blue tint, which means that the emmc module has not been found.

I need more information on how to proceed.
I have already tested inject in another emmc module the backup that I have, but without success, when trying to start the system or perform a hardreset the switch presents me with an error 2002-4686.

Is there a tool or something I can do like 3ds?
I speak of the Ctrnand process.
If anyone has tips or more information, I thank you from the heart.
Below are some images of the problems identified.

 

sorry, the pics:

 

they are functional, I tested another emmc at least the other emmc and the modchip are good, I don't know the original emmc, but I believe it is good, since during formatting, the console was not touched.

 

i tested another emmc, and nothing.
but I will look at the connector of the Switch module.

it can't be the SD, I tested the backup before on 6 different microsds.
and always gave the error in the same place, 20%