and/or cable for test? Personally I'd use Tweek\ufffd (available at hi-end audio shops) or Cramolin\ufffd (various nostrums - at decent electronic tech parts suppliers) - and treat every connection in the chain: usually with a nail-polish remover type small brush. Hell - it's a good time then to do the mem sticks and all other plug-ins: cheap insurance for all intermittents.

Was getting similar errors on a friend's ancient DX-66 (!) but which has a snazzy SCSI HD. Pushed down all movable ICs on ctrl card (one squeaked) - as I didn't have Tweek handy. Cleaned as many connectors as I could, with stone knives & bearskins. Errors haven't recurred, but I'll Tweek it, if they do.

Vibration *does* cause lots of ICs to slowly slither up, I and others have found..

HTH,


Ashton
'Course as said - bad physical HD or its servo electronics (??)