820-00430 – Apple A1418
820-00430 is the Apple main board used in the Apple A1418. The catalog lists 2 files for it: 2 BIOS files.
File names mention revision A. First posted in November 2018 in BIOS Archive.
BIOS dumps 2
Board facts
| Board number | 820-00430 |
|---|---|
| Numbering | Apple board number |
| Revisions | A |
| First seen | 2018-11-03 |
| Source channels | BIOS Archive |
| About the number | Apple logic boards are numbered 820-xxxx or 820-xxxxx; the trailing letter is the revision. |
Apple models for this logic board
| A-number | Model | Years |
|---|---|---|
| A1418 | iMac 21.5-inch | 2012–2019 |
A-numbers come from the file names; the model names and years are Apple's published identifiers.
Laptops that use 820-00430
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the 820-00430 board?
Files in the catalog link 820-00430 to the Apple A1418.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.