BIOS firmware for the Lenovo ThinkPad T570, made for motherboard 16820-1 and labelled LTS-1 in the name, supplied as a 7.75 MB RAR archive. The five-digit dash-revision board number follows the Wistron pattern, so the ODM is Wistron rather than Lenovo. Use it to reprogram the SPI flash with an external programmer when the machine is dead or stuck in a boot loop. Confirm the board number on the PCB first, and dump the existing chip so serial and machine-specific data can be restored if needed.
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 →