RAR archive holding a BIOS (EFI boot ROM) dump for the Apple MacBook Pro A1297, logic board 820-2849-A, around 2.8 MB in size. It suits repairs where a 17-inch unibody powers on without chime or video due to a damaged firmware region. Flashing is done with an SPI programmer such as CH341A or RT809H, either in circuit with a clip or with the chip lifted. Compare the board number and revision on the PCB first, back up the original chip, and make sure the extracted image matches the flash size exactly.
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.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 12 Oct 2017 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | Open file on RM Schematics |
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 →