Q: Hi i am after pcb 100781943 REVA, from external portable 2TB 2.5hdd as it not showing in windows. Please help.
A: If your HDD can’t spin, you can swap PCB to try. https://www.hddzone.com/seagate-pcb-100781943-p-2021.html is your donor PCB. When you get this PCB, you need to move your original PCB’s BIOS to the replacement PCB. The 8pins (4 pins on each sides) with 25P05VP、25P10VP、25F512、25F1024、25F1024AN、SST25VF512、SST25VF010, etc. are the BIOS.
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Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!