Main BIOS binary for the HP Pro 3420 All-in-One, taken from the WJ5 board, compressed into a 2.13 MB ZIP. WJ5 matches the Quanta project code used by this all-in-one family, but the exact board revision is not stated. The main.bin image is intended for programming the SPI flash chip with a hardware programmer when the system shows no display or will not POST. Compare the motherboard label first, dump the original chip as a backup, and confirm that the binary size equals the chip capacity.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →