Tested working BIOS package for the ECS BAT-12J1800 motherboard, a 3.86 MB RAR. The board carries a soldered Intel Celeron J1800 dual-core SoC, and ECS also makes a separate ATX variant with a similar name, so check the exact model printed on the PCB. Technicians use such an image to revive the SPI flash with a CH341A or similar programmer. Read and keep the original chip data before erasing and verify that the dump size equals the chip capacity.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @hrtechno. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)