BIOS image for the Wistron Brook_SL board 14277-1M, with the board part number 448.05804.001M stated in the name, archived as a 4.42 MB RAR. Wistron uses the 448 prefix on board stickers, so matching that number gives confidence the dump fits. Flash it to the SPI chip with a programmer such as a CH341A or RT809 after saving the original contents, and verify the image size against the chip capacity. It helps revive boards that power on but show no display due to corrupted firmware.
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 →