FAILED: GA-J1900N-D3V (rev. 1.x)

Hi there,

I might have bricked my GA-J1900N-D3V (rev. 1.x) mainboad using flashrom.
The BIOS/UEFI was in fallback mode using an old version of the BIOS (F1). This happened before using flashrom and is unrelated (but might be helpful to you). I am not sure what triggered the fallback - I blame it on a possible stuck power on switch triggering a manual failover.

I did a successful read before the attempted write. The file is saved.
Below is the full terminal output of the process.

Hope you can help me.

Thanks,
Christian

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flashrom -p internal -w J190ND3V.F7
flashrom v1.2 on Linux 5.4.80-gentoo-r1-x86_64 (x86_64)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found chipset "Intel Bay Trail".
Enabling flash write... Warning: BIOS region SMM protection is enabled!
Warning: Setting Bios Control at 0x0 from 0x22 to 0x01 failed.
New value is 0x22.
OK.
Found Macronix flash chip "MX25U6435E/F" (8192 kB, SPI) mapped at physical address 0xff800000.
Reading old flash chip contents... done.
Erasing and writing flash chip... Transaction error!
spi_write_cmd failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
Transaction error!
spi_write_cmd failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
Transaction error!
spi_write_cmd failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.

Transaction error!
spi_write_cmd failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
Transaction error!
spi_write_cmd failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
Looking for another erase function.
Looking for another erase function.
No usable erase functions left.
FAILED!
Uh oh. Erase/write failed. Checking if anything has changed.
Reading current flash chip contents... done.
Apparently at least some data has changed.
Your flash chip is in an unknown state.
Get help on IRC at chat.freenode.net (channel #flashrom) or
mail  with the subject "FAILED: <your board name>"!
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DO NOT REBOOT OR POWEROFF!