BIOS image for the Lenovo ThinkCentre M90 desktop, machine type 3692, built on the IQ57I motherboard at revision 1.0. Supplied as a 3.68 MB RAR. A dump like this is used when the system no longer posts due to corrupted firmware, or after replacing a flash chip, by writing it directly with an SPI programmer. Desktop dumps can carry the previous owner's serial and DMI data, so keep a backup of your original chip to restore identity details, and confirm the flash capacity matches the image.
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 →