Toshiba MK5055GSX 500GB 2.5" SATA PCB — HDD2H21 D UL01 T / G002439-0A

Replacement printed circuit board for Toshiba 2.5" SATA hard drive model MK5055GSX (500GB). PCB part number G002439-0A, marked HDD2H21 D UL01 T. Intended for use with the Toshiba MK5055GSX 500GB SATA 2.5" drive — matches the listed model and PCB identifiers. Verify the PCB markings on your drive to ensure compatibility prior to installation.