BIOS for the ASUS X552MD laptop, which uses the X550MD mainboard at revision 2.0. ASUS often fits one mainboard to several model names, so the board label on the PCB matters more than the case sticker. Program the image into the SPI flash with a CH341A or a similar programmer when the system will not post. ASUS dumps can hold model and serial data, so read and keep the original chip contents first. Also verify that the image size equals the flash 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 @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 →