Firmware archive for Dell Inspiron 5501 and 5508 laptops, referencing the Wistron board 19775-1. The RAR likely contains a BIOS image for recovering a dead or bricked machine by writing the SPI chip with an external programmer. Five-digit numbers with a dash suffix follow Wistron's numbering, and Wistron builds many Dell boards. Before flashing, read and save the original chip, compare the board number on the PCB, and make sure the dump size matches the flash part, because a mismatched image will not fit.
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 →