I’m seeing a series of 2D barcodes show up on the logic board of Macbooks in repair and teardown videos. Does Apple and its suppliers uniquely identify their chips, PCBs, and components using unique IDs? Can a person rely on these codes to confirm if they took their machine to say a repair shop that they received back the same hardware that was sent out?
Logic Board
Here’s an example of a 2D barcode showing up on the logic board PCB.
The identifying text next to the code on a logic board reads as
C02220700
EA02K4 AW
OEO 3.5G 32G
I scanned that barcode off a screenshot using a Zebra DS22 barcode scanner, which read the barcode as J02220700>A02T4A< (https://archive.is/7u5wo)
Wireless Module
Here’s an example of a barcode printed on a Wireless Module
My scanner read the code as 21031805010421120880083035, a 26 character number where the last 8 digits are also printed on chip packaging.
USI
339S00758
80083035
(https://youtu.be/B_mb5TC7mcE?t=84; apparently this is a Apple USI 339S00758 – Wi-Fi 6/Bluetooth 5.0 module
https://discussions.apple.com/thread/252113060?answerId=254011100022&sortBy=rank#254011100022)
Flash NAND Chips
Here’s an example drawing from some silver packaged Flash NAND chips used for the hard drive. There’s other barcoded components visible on image as well, two of which my scanner was able to read, though the clarity was lacking I assume there’s typos (https://youtu.be/4U9nCMV7cv4?t=537, https://wccftech.com/m3-macbook-air-faster-ssd-speeds-thanks-to-dual-nand-flash-chips/)
