Working BIOS dump for the HP Pavilion 20 all-in-one, Quanta board DA0WJBMB6D0 revision D, labelled for chip position U13, in a 4.13 MB RAR archive. The DA0 prefix and letter revision follow Quanta numbering, the ODM that made the board. The U13 reference tells you which chip on the PCB holds the firmware. Flash it with a programmer to recover a unit that powers on without display, but first save the original chip, confirm revision D on the board, and check the image size fits.
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 →