Apple MD094LL/A manual When replacing the rear housing follow these important steps

Reassembly

When replacing the rear housing follow these important steps:

1Handling: Handling the rear housing incorrectly could flex aluminum and cause alignment issues.

Always handle rear housing with 2 hands in the lower left and right corners.

Never carry rear housing with a single hand, or by the aluminum “chin” near the Apple logo.

2Optical Drive Bezel When replacing the rear housing, if the unit has a Sony optical drive mechanism, it may need a different optical drive bezel. A new bezel kit is included with a new rear housing

Check the EEE code in the serial number of the bezel. The EEE code is located at the end of the serial number, starting with the 4th digit from end. If EEE code is A2W, continue with procedure.

2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Rear Housing  267