Apple · laptop motherboard

Apple iMac 27 5K 820-00609

SchematicBIOS
Board code
820-00609
Revisions
Rev A
Files
4
Updated

Apple iMac 27 5K 820-00609 is a laptop motherboard used in the Apple iMac 27 5K, Apple iMac A1419 and Apple A1419-820-00609-A.

The catalog has 1 schematic and 3 BIOS files for it, posted between 2020 and 2024 across 3 Telegram channels. Each download button opens the original Telegram post.

The files are marked Rev A; other revisions of the same board can differ in parts and layout.

The schematic is a PDF; the first pages usually hold the block diagram and the power sequence. New to schematics? Start with How to Use a Schematic and a Boardview Together.

BIOS notes: versions with a cleaned ME region are included. Read and save the original chip contents before you write anything to it — Keeping the Windows Product Key (MSDM) When Reflashing a BIOS.

Compatible models

Files for Apple iMac 27 5K 820-00609

Schematics 1 All schematics →

BIOS and firmware 3 All bios and firmware →

Frequently asked questions

Which laptops use the 820-00609 motherboard?
File names in the catalog tie 820-00609 to the Apple iMac 27 5K, Apple iMac A1419 and Apple A1419-820-00609-A. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of 820-00609 do I have?
Files for this board mention Rev A. The revision is printed on the PCB silkscreen, usually next to the board code. Pick files with the same revision when you can; if yours is not listed, the closest revision is usually fine for the schematic but check part positions in the boardview carefully.
What should I check before flashing the 820-00609 BIOS?
Read the original chip with a programmer and save two copies before writing anything. A dump from another board carries that board's serial number and MAC address, so restore yours from the backup.

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Files are hosted on Telegram by third parties; ExcitingSpas.com only links to public posts. Check that a file matches your board before using it. Disclaimer · Report a file