Chip de firmware BIOS EFI A1311 Apple iMac 21.5" i5 2.7G MC812LLA Mid 2011 EMC 2428
BIOS EFI firmware chip: A1311 Apple iMac 21.5" i5 2.7GHZ MC812LL/A. Mid-2011 EMC 2428. This chip has to be soldered on board. (1) to fix a corrupt (bricked) EFI firmware bios chip. (Chip to be soldered on board).