Archive containing both BIOS and EC firmware, labelled L390, most likely a Lenovo ThinkPad L390. LKL-2 appears to be a platform or board code, but its meaning is not confirmed by the name. With both images, a technician can restore the main SPI flash and the embedded controller, which matters when a board will not power on or charge. Identify the chips on your board, match the platform, and dump both originals before writing anything.
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 @biosfilebins. 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 →