BIOS dump for the Dell OptiPlex 780 desktop board marked CN-0V4W66, dated 2014.09.21 and sized for an 8MB flash chip, packed in a 2.23 MB RAR archive. The CN-0V4W66 code is the Dell part number found on the board label, which should match your unit. Such an image is written with an SPI programmer like a CH341A when the board is bricked or stuck after a failed update. Read and keep the original chip contents first, since service tag and system data may be stored there.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 14 Jun 2022 | Open file on RM Schematics |
| @fileservicelaptop | 14 Jun 2022 | Open file on RM Schematics |
| @anztechnology | 11 Oct 2025 | 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 →