820-3481 is a Apple motherboard used in Apple devices. Enginerys has 9 BIOS dumps for this board, collected from public Telegram channels.
Check that 820-3481 matches the number printed on your PCB, including the revision. Where to find it →
820-3481 BIOS dumps
- BIOS Apple iMac 27 Late 2013 820 3481 A telegram BIOS Repair 2025BIOS · 820-3481 · 8.53 MB · 18 Sept 2025BIOS zip8.53 MB
- Apple iMac 27 Late 2013 (820-3481-A)BIOS · 820-3481 · 8.00 MB · 12 May 2025BIOS bin8.00 MB
- Apple iMac 27 Late 2013 (820-3481-A)BIOS · 820-3481 · 8.00 MB · 10 May 2025BIOS bin8.00 MB
- Apple iMac 27 Late 2013 (820-3481-A)BIOS · 820-3481 · 5.59 MB · 20 Jan 2024BIOS rar5.59 MB
- 820-3481-ABIOS · 820-3481 · 8.00 MB · 4 Jan 2024BIOS bin8.00 MB
- BIOS Apple iMac 27 Late 2013 (820-3481-A)
BIOS image for the Apple iMac 27-inch Late 2013, logic board 820-3481-A, compressed in a 7.80 MB RAR.
BIOS · 820-3481 · 7.80 MB · 28 Mar 2022BIOS rar7.80 MB - Apple iMac 27 Late 2013 (820-3481-A)
Firmware image for the Apple iMac 27 inch Late 2013, logic board 820-3481-A, where A is the revision suffix in Apple 820 numbering.
BIOS · 820-3481 · 8.00 MB · 23 Oct 2021BIOS bin8.00 MB - Apple iMac 27 Late 2013 (820-3481-A)BIOS · 820-3481 · 8.00 MB · 21 Jul 2020BIOS bin8.00 MB
- Apple iMac 27 Late 2013 (820-3481-A) Clear me
Cleaned EFI firmware for the Apple iMac 27 inch Late 2013 on logic board 820-3481-A, the Clear me note implying the image was prepared without the original machine data.
BIOS · 820-3481 · 8.00 MB · 21 Jul 2020BIOS bin8.00 MB
Questions about 820-3481
Is there a schematic for 820-3481?
No standalone schematic PDF has been indexed for 820-3481 yet. Check the archives listed on this page — schematics are often packed together with the boardview — or search again later, as the index is updated daily.
Is there a boardview for 820-3481?
No boardview has been indexed for 820-3481 yet.
Who makes the 820-3481 board?
820-3481 follows the Apple numbering scheme (820-xxxxx). It is found in Apple devices.