If the board was improved after it was made or someone checked the serial number on the board that was fitted in the factory initially, you could know that the one in there wasn't original. Usually a logic board has it's own internal serialization, but you need to open the hardware to see that or have knowledge of revisions on the boards. There should be time stamps when it started repair - possibly a list of parts used, probably some test results they ran, etc. Since you paid for the repair, Apple should walk you though re-joining the Time Machine over the phone or via internet chat for free post repair.ĭid you have it serviced via mail in or at an authorized service provider or at a genius bar? The steps to get repair details can change a little - but you could start by calling AppleCare and asking them to read the technician notes that were left by the repair tech. You could try dumping the hardware identity from the Time Machine backup directory: xattr -p /Volumes/yourBackupDrive/Backups.backupdb/yourMacName However, the Time Machine change makes me conclude you have a new board. You can't easily tell from software that you have a new board unless the technician failed to properly deserialize the part that was "allegedly" put in.
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