Q1: I have a Hitachi HDD model HDT721075SLA380.
The controller of this HDD is broken, it has something to do with the power.
My controller has the code ‘0A29871’ to the PCB itself and the infineon
microcontroller has the code ‘0A56992’.
Q2: I should replace the pcb of my hard disk
HDT721075SLA380 HITACHI SATA 3.0 GB / S
P / N 0A38111
S / N MG0529MA
CAPACITY
750GB MLC BA30313
LBA 1465149168
0A29871BA2937BM60832C361
Number on chip
0A56992 
This Hitachi OA56992/0A56992 PCB Circuit Board is listed in IBM/Hitachi PCB on HDDZone.com
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