BIOS firmware package for the Acer Aspire ES1-433 and ES1-433G, built on a Pegatron mainboard marked EJRDA / EJ4DA at revision 2.0. The RAR archive, 4.72 MB, holds the dump intended for the onboard SPI flash chip. Technicians use such an image to recover a board that powers on without display or loops after a failed update. Extract it, read and save the original chip contents with a programmer such as a CH341A first, confirm the PCB label and revision match, and check that the image 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 .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 →