I have a Hitachi HDS721064CLA332 640GB with broken Board. It snapped off at the end. Anyways is there a way i can find out if and what models are compatible with this drive for swaping the board? i found one for this drive on ebay but its going to cost me 40.00 in total i want to find a cheaper board. so i came here to ask about compatible boards
With Hitachi drives you need to transfer an 8-pin "NVRAM" chip from patient to donor. An added complication is that under some circumstances, if you attempt a board swap without NVRAM transfer, it is possible to corrupt the NVRAM of your donor PCB, resulting in a dead donor HDD.
The following supplier includes a free chip transfer if you purchase your board from him: