BIOS and IO firmware for the Lenovo ThinkPad Edge E535 on Compal board LA-8124P, stored in a 2.25 MB RAR. IO here most likely means the embedded controller or keyboard controller image that comes with the main BIOS. Compal LA-xxxxP numbers identify the ODM board design. Flash each image to its own chip with a programmer when the laptop is dead or will not charge or start. Save the originals, and check the chip sizes and that LA-8124P appears on the PCB.
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 →