Micro QR-code reading solution
The "QR" code is actually Data Matrix (QR codes have "eyes", DM codes have "solid L and dotted L" along the edges).  To decode it, you can just put the image into the ZX decoding website, which says the code reads "257202010448".  It is most likely to be some internal code of the board manufacturer.

Manufacturers normally only label custom parts or programmed parts such as ROMs, microcontrollers, FPGAs etc, and so are very rarely replaceable without a spare from the manufacturer.


  Raw bytes: 9b ca 84 83 86 b2 81 38
  Barcode format: DATA_MATRIX
  Parsed Result Type: TEXT
  Parsed Result: 257202010448