Tested BIOS archive for the Dell OptiPlex 7080 Tower desktop. The name lists no motherboard number or revision, so confirm compatibility from the system model and the board itself. At about 10.5 MB the archive likely holds a full SPI image. Programming the flash chip directly with a programmer brings back a board that no longer posts. Read and save the original chip first, since it carries the service tag and system configuration.
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 @generalbios. 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 →