No spin, no light, no sound — total silence is its own diagnosis category, and often better news than a noisy failure. Dead-on-arrival drives usually mean electronics or a seized mechanism, not lost data. The bench establishes which for free, then quotes fixed.
$ edr diagnose /dev/sdb → Device: Seagate BarraCuda 2 TB → Status: BUZZING — seized, not recognised → Client: confidential · Edinburgh $ edr engineer-working → Read-write heads: replaced from donor → Spindle: released, platters clean → Imaging: 98% · 72 hours $ edr verify → ✓ shoot_RAW — recovered → ✓ client_galleries — safe → ✓ drive — recovered
Sacrificed electronics: a power spike hits, and the drive’s protective components on the circuit board die absorbing it — doing their job, leaving platters pristine behind a dead PCB. Seized mechanics: the spindle can’t turn (bearings, or heads stuck to the platter after a knock) — the drive powers but never spins up, sometimes with a faint tick or buzz of effort. Firmware refusal: the drive spins, thinks, and declines to identify itself — alive but mute, its internal software corrupted. Each has a distinct bench route; none is improved by trying other cables, other computers, and other days.
The internet’s favourite dead-drive fix — buy an identical drive, swap the green board across — stopped working around two decades ago. Modern drives store adaptive data on the board: calibration unique to that drive’s heads and platters, written at the factory. A donor board without your board’s adaptives leaves the drive dead or, worse, wobbling through miscalibrated reads. Proper electronic recovery repairs your board or transplants its adaptive chip to a donor — component-level work that returns the drive to exactly itself. If you’ve already tried a swap, no shame: send both boards and everything else in the box.
Frequently, and it's one of the better faults to have: surge damage typically kills protective board components while the platters stay untouched. Board-level repair with the drive's own adaptive data carried across, then imaging as normal. Don't test it on another PSU 'to check'.
A buzz or tick without spin-up usually means a motor trying and failing: seized bearings or heads adhered to the platter surface. That's mechanical work, not electronic — and repeated power attempts strain the very components that need to survive. Off, boxed, in.
Genuinely sometimes — which is why it's the first two minutes of the free diagnostic rather than a paid assumption. External users: the enclosure's own electronics fail more often than the drive inside. Either way you'll know for £0.