PCB Controller. Tested, Working. PCB Controller from working HDD. Bulk. No HDD included.

This item has been tested andremoved from a working hard drive, and as such is in good workingcondition. Due to the possibility of mis-installation or otherunforeseen occurences we are unable accept returns on this item. This isjust an electronic board for Hard Drive. The hard drive is notincluded. All sales of PCB boards are final due to installation issues,there is no refund or exchange policy. We can only provide basicinformation on the compatibility issues. Picture shown may wary fromactual product. Standard International Shipping will arrive within 5-25business days. We ship only to confirmed PayPal addresses. We dont ship to a Post Office (PO) !

It's important to know when a PCB is bad and when swapping it with a donor PCB could work. A thorough diagnosis is required. Embedded in a Firmware on the PCB is "adaptive data" that is unique to the hard drive it's attached to. This "adaptive data" includes information about the hard drive's heads, its firmware version, any bad sectors in the drive's service area, and more.  It's possible, if the "bad" hard drive is completely dead, that swapping the PCB may get the hard drive spinning again. However, it will likely start clicking, or at least not provide any access to the user data area of the hard drive. In this case, the way to successfully perform a PCB swap is to move that unique Firmware data from the original "bad" hard drive's PCB to the donor PCB. This is accomplished using special tools or by manually moving the Firmware to the donor PCB. It should also be noted that sometimes a PCB is bad and the electronics in the hard drive failed. Swapping the PCB in this case could end up destroying the donor PCB.

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