Apple 820-00431 BIOS
File details
| Type | BIOS |
|---|---|
| Brand | Apple |
| Board number | 820-00431 |
| Board maker (ODM) | Apple |
| Device | Laptop |
| Format | ZIP |
| Size | 4.7 MB |
| BIOS chip size | 8 MB |
| Added | January 23, 2022 |
| Updated | |
| Original file name | IMAC 21.5 820-00431-A 8MB BIOS ORIG.zip |
Where to get the file
Opens the matching file on RM Schematics, or its source details if it is not catalogued there yet.
Alternative links
No other copies are known yet.
Description
BIOS dump for an Apple laptop with board number 820-00431, supplied for an 8 MB flash chip. The original file name, IMAC 21.5 820-00431-A 8MB BIOS ORIG.zip, points to the board's base dump, roughly 4.7 MB in ZIP format. A BIOS dump like this is used to reprogram the SPI flash chip with a programmer after corruption or a failed update. Confirm that the board number and revision on your logic board match before flashing, and back up the chip's original contents first.
For board 820-00431 the catalog also has 1 schematic, 1 boardview file, and 2 BIOS dumps.
Description generated from the catalog data. ·
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Questions about this file
How do I flash this BIOS dump?
Write it to the SPI flash chip with a programmer such as the CH341A and a SOIC8 clip. Read and keep the original contents first, and check that the chip size matches the dump.
Will this BIOS work on my board?
Only if the board number and revision match: Apple 820-00431. Dumps from a different board or revision can leave the board dead.
What does “clean ME” mean?
The Intel ME region in the dump has been reset, so it can be used on another board of the same model. Keep your original dump and transfer serial numbers if needed.