Q: I have this damaged HGST PCB identified as: 0j24571 and on the back as 110 0a90415 01, HDD Mod. hts541010a7e630 1 TB drive, and looking for replacement. From a similar PCB in your web site,I can see the price would be us$42. The small ROM (NVRAM?) it is difficult for me to remove given its small size and for this reason, I fear to fry nearby components.
A: https://www.hddzone.com/hitachi-pcb-0j24571oj24571-p-1982.html is your donor PCB. You can move the BIOS from your original PCB by using hot-air gun, then solder it on the replacement board. Please refer: http://www.datarecoveryunion.com/hard-drive-rom-chip-swapreplacement/. Or you can find an electronics repair shop help you.