Version 1 and Version 2 logic boards are similar and must be replaced like for like. To differentiate boards, check the EEE code (the last three digits on the serial number bar code). The EEE code is HHQ, HHP, HJZ, HKD, or HL9 for Version 1 logic boards and HQT, J6M, or JVE for Version 2 logic boards.

Note: In some cases, an extra digit may be added to the end of the logic board's serial number. If none of the EEE codes listed above match the logic board you are attempting to identify, remove the last digit of the serial number and check these codes again.