Firmware dump for the Compaq Presario CQ42-276TU on Quanta board DA0AX1MB6H1, revision H, labelled U12. The label likely refers to the board location of the flash chip it was read from. This Quanta AX1 board is shared across several HP and Compaq models, so the same dump may serve related units. Technicians use it to reprogram the SPI flash with an external programmer when the machine fails to start. Save the existing chip contents first, and make sure the image size matches the chip.
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 →