BIOS dump for the Dell OptiPlex 990 desktop, with board identifiers E93839 and KAO120 and a 25Q16 flash chip of 2 MB capacity, packed as RAR. The 25Q16 is a 16 Mbit SPI part, so the image should be exactly 2 MB to fit. Technicians use it to reprogram the chip off-board or in-circuit when the system fails to start after a corrupted update. Back up the original chip before writing, since it may hold the service tag, and confirm that the board markings match those in the name.
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 →