Type-C BIOS file for the Dell 5520 built on Compal board LA-K491P, supplied as a RAR archive. At only 138 KB, it most likely targets the USB-C power-delivery controller's small flash chip rather than the main system BIOS, so check the contents before use. A damaged image there typically shows up as a USB-C port that will not charge or a dead port. Write it with an SPI programmer, keep a copy of the original chip, and verify that the PCB number matches.
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 @sbiosworldchannel. 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 | |
|---|---|---|
| @sbiosworldchannel | 11 Mar 2026 | Open file on RM Schematics |
| @skclappybios | 11 Mar 2026 | Open file on RM Schematics |
| @sboisworld | 11 Mar 2026 | Open file on RM Schematics |
| @dtechbios | 11 Mar 2026 | 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 →