Hello! All that I will describe here I did and it definitely works! In my case, with exactly the same symptoms, the reason was in BIOS. There is a JSPI1 connector on the device’s motherboard, BIOS cannot be flashed through it, but you can connect a chip with a working BIOS, the device will boot from this chip, disconnect the chip and use a program such as flashrom to flash BIOS, after that I completely restored the device’s functionality.
A temporary working BIOS needs to be connected to the JSPI1 connector as follows: the first leg of the chip with 5 JSPI1 legs, 2 with the chip foot with 3 JSPI1, 3 chip legs is not used, 4 chip foot with 7 JSPI1 legs, 5 chip foot with 4 JSPI1 legs, 6 legs with 6, 7 leg of the chip with 9 leg of JSPI1, 8 leg of the chip with 2 leg of JSPI1(
https://www.flashrom.org/MSI_JSPI1).
In the device, the bios is recorded on Winbond W25Q32(W25Q32BVSSIG or W25Q32FVSSIG), but you can use another 4mb (I downloaded from Amtel).
To program the temporary BIOS chip, I used the ch341a programmer, and the chip itself was soldered to the adapter. In this form, and connected to JSPI1, using another home-made adapter, the device is loaded from a temporary BIOS. Some sources say that the wires should be short, everything worked for me with 25cm wires.
For flashing BIOS, you can install Ubuntu Server and install flashrom program on it, or you can use the NAS OS,
install the NAS OS Empty App application(
https://github.com/Djailla/nas-os-empty/releases/download/nas-os-empty-1.0.0/com.djailla.empty-1.0.0-x86_64.rbw),
connect to the device via SSH,
enter in to the application( # sudo rainbow --enter com.djailla.empty ),
add repositories( # echo 'deb
http://archive.debian.org/debian wheezy main' >> /etc/apt/sources.list && echo 'deb
http://archive.debian.org/debian-archiv ... -security/ wheezy updates/main' >> /etc/apt/sources.list )
update repository data( # apt-get update ),
install flashrom(apt-get install flashrom)
and flash BIOS( # flashrom --programmer internal -w /shares/you_share/ES020IMS.100.bin ).
Photos and fully working BIOS leave here.
At the same time, the support of the seagate could not give me the BIOS file, but the world is not without good people and I found an advertisement for the sale of such a device and the owner kindly agreed to help me. I take this opportunity to thank Kirill once again for agreeing to make a backup copy of BIOS from his device.
If you do not understand the recovery process or have questions, I will try to answer. I did it all!
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