Tested BIOS for the ASUS X550IU laptop, mainboard revision 2.0, reported as working. The TB tag in the name is not explained, so check archive contents. Supplied as a RAR of about 3.82 MB, it is meant for reprogramming the SPI flash chip with an external programmer when the machine fails to start, shows no picture or loops on power. Match the model and revision on the motherboard, save a backup of the original chip in case it holds serial data, and verify the file 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 @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 →