Firmware archive for the Toshiba Satellite L755-S5112, with PSK1WU being the Toshiba part number of that configuration. No motherboard number is stated, so confirm the board code on the PCB before using this image on another L755 unit. The rar is intended for SPI BIOS recovery with an external programmer, typically for laptops stuck on a black screen or bricked during an update. Check the archive contents and confirm the image size fits the installed flash chip, and always save the original chip dump first.
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 →