820-3024

820-2855

MacBook Air 11-Inch Mid 2011

MacBookAir4,1

A1370 emc2471

To open the Mac you need a PL4 Pentalobe screwdriver.

The EFI-ROM (U6100) is a WSON chip (64Mbit).

The ROM in on the bottom (hard to reach) side of the motherboard.

The 820-3024 and 820-2855 boards are almost identical. The difference in in the amount of RAM.