What is the usual failure mode of a clicking 2008 Hitachi Deskstar HDP725050GLA360? I though it'd be the heads, PCB seems fine. On a cold power on it beeps twice (from the head coils?) and then just clicks, even though the spindle is spinning.

If it usually is the heads, I think I'll simply send it to a DR cleanroom to have the heads swapped and go from there, as that is affordable for my client. (I don't have my own cleanroom or one close by to rent/lend for a few hrs anymore )

hi,
Seems bad heads and one of the Platter might be damage too after Proper Diagnosis only anyone can come to the Right Conclusion if you don't have Clean Room better send Experts who Deal Physical cases if Drive platter have scratch also still chance to Recover some Data.