This thread is for the Apple iMac 17 A1195 with main board 820-2090.
Apple logic boards use 820- numbers. Check the number printed on the PCB before you download.
Files wanted for this board
Typical reasons to reflash: no boot or no chime after a firmware update, a firmware (EFI) password lock, or a corrupted ROM after liquid damage.
Before flashing, always read and save the original chip. It holds the serial number, UUID, MAC address and ME data for that exact machine.
If you have a working file for this board, please share it below. More files: search 820-2090 in File Finder.
Apple logic boards use 820- numbers. Check the number printed on the PCB before you download.
Files wanted for this board
- EFI firmware (full SPI ROM dump)
- Schematic (PDF)
- Boardview (.brd / .bdv / .cad)
Typical reasons to reflash: no boot or no chime after a firmware update, a firmware (EFI) password lock, or a corrupted ROM after liquid damage.
Before flashing, always read and save the original chip. It holds the serial number, UUID, MAC address and ME data for that exact machine.
If you have a working file for this board, please share it below. More files: search 820-2090 in File Finder.
