Toshiba Satellite C850 BIOS firmware packed in a RAR archive of 3.09 MB, labelled for the PLF, PLR, CSF and CSR board variants in the UMA configuration, meaning integrated graphics only with no discrete GPU. Technicians use such a dump to reflash the SPI chip with a programmer when the laptop shows no image, loops on power or has a corrupted BIOS. Confirm the board marking on your PCB matches one of these variants and that it is a UMA board, and read and save the original chip contents 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 @biosarchive. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 31 Jan 2018 | Open file on RM Schematics |
| @abgm_manutencao_bios | 9 Aug 2019 | Open file on RM Schematics |
| @biositechyangiyer | 19 May 2020 | Open file on RM Schematics |
| @biosdumpcomputer | 25 May 2022 | Open file on RM Schematics |
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 →