Apple A1286 820-2850 BIOS (4 MB)
File details
| Type | BIOS |
|---|---|
| Brand | Apple |
| Model | A1286 |
| Board number | 820-2850 |
| Board maker (ODM) | Apple |
| Device | Laptop |
| Format | RAR |
| Size | 4.6 MB |
| BIOS chip size | 4 MB |
| Added | June 28, 2025 |
| Updated | |
| Original file name | APPLE A1286 MLB 820-2850-A 4MB BIOS.rar |
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
APPLE A1286 MLB 820-2850-A 4MB BIOS BIOS dump for the Apple A1286 laptop, logic board 820-2850 (file name lists revision A), built for a 4 MB flash chip. The archive is a RAR file of about 4.6 MB. Technicians use a dump like this to reprogram the SPI flash with a programmer after BIOS corruption or a failed update. Before writing anything, confirm that the board number and revision on your logic board match 820-2850-A, and back up the original chip contents first so you can restore them if needed.
For board 820-2850 the catalog also has 2 schematics, 2 boardview files, and 5 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 A1286 820-2850. 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.