Toshiba PCB G003235B swapping steps:
1. Find the correct Toshiba donor PCB?
You should find the PCB’s board number. Toshiba PCB’s board number begins with G00**. Please refer the attached photo:
This PCB’s board number is G003235B. You can order it on https://www.hddzone.com/toshiba-pcb-g003235b-p-2002.html
2. PCB board firmware(BIOS) transfer
Transfer PCB board firmware(BIOS) to make the donor PCB work on the original hard drive.The firmware includes HDD’s unique configuration data. The hard drive needs this unique configuration data to work. So we should transfer this BIOS from the original (bad) PCB to the donor PCB, then donor board can work on the original hard drive. Please refer the attached photo:
This is BIOS chip of Toshiba PCB G003235B:
3. Put back the replace(donor) PCB to the Hard drive.
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Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!