BIOS image for the ITX-MJ1900T2C mini-ITX board, packed in a RAR of about 6 MB; the name gives no brand, version or chip details. The model code suggests an embedded Mini-ITX board, but confirm the exact model on the PCB itself. Such a dump is typically written to the SPI flash with a programmer like a CH341A when the board no longer posts or after a failed update. Save a copy of the current chip first, and check that the extracted file size equals the flash capacity before writing.
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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →