A drive that does nothing — no spin, no light, no detection — feels final. Mechanically it almost never is: ‘dead’ is a symptom with four common causes, three of them very recoverable, and the difference between them decides your next move. Work the tree from the top.
Rule out what feeds the drive, then what runs it, then what spins it. Most ‘dead’ drives fall at the first two branches — the cheap ones.
Start where it’s free. Power and connection: a different SATA power lead on a desktop, a different USB cable on an external — cables fail constantly and produce a perfect imitation of death — then a different port, avoiding unpowered hubs and front-panel sockets that struggle to feed desktop-class externals. The enclosure: external drives are a bare drive plus a small USB bridge board, and the bridge dies far more often than the drive. If comfortable, the bare drive can be tested in a dock or another enclosure; one caution before you do — some externals (notably several Western Digital ranges) encrypt through that bridge board, so keep the original enclosure even if it seems dead, because its board can matter to the recovery. Not comfortable opening it? That test is the first thing the free diagnostic does anyway.
A drive that takes power but stays perfectly silent — no spin-up vibration, no sounds at all — has usually lost its own circuit board: a power surge, a reversed adapter on an external, or simple component failure kills the board’s protection diode or a controller chip in an instant. This is genuinely repairable bench work, with one modern catch that kills the DIY version: the board carries calibration data unique to its drive in a ROM chip, so repair means fixing your board or moving that chip’s contents to a donor — never a blind swap. Done properly, surge-killed drives routinely return to full readability; the details live on our won’t-power-on page.
The remaining patterns are mechanical and they announce themselves. A faint hum or buzz with no spin-up: the motor trying and failing to turn — on drives that have been dropped, often seized bearings or heads stuck to the platter surface. Beeping from a drive (really the motor whining against resistance): same family. Spin followed by clicking: alive but lost — that’s the clicking guide’s territory. All of it is clean-air transplant work — motors, head assemblies — followed by careful imaging, and none of it is helped by repeated power-ons ‘to check’: a stuck head dragged across a platter by hopeful retries does exactly the damage you’d imagine. One power-on told you the symptom; the second one is for the bench. The route in either case: hard drive recovery, starting with the free 48-hour diagnostic and a fixed written quote.
Almost certainly not. ‘Dead’ describes the drive’s behaviour, not the data’s condition — the platters or chips holding your files are usually intact behind whichever component failed. Electronics get repaired, motors and heads get transplanted, and the contents get imaged. Truly unrecoverable drives are rare; drives made unrecoverable by determined DIY are less rare.
On external drives, very often — and it’s the one test worth doing. The USB bridge board inside an enclosure dies far more readily than the drive it carries. Try a different cable and a powered port first; beyond that, the bare drive can be read in another enclosure or dock — but if the drive matters and you’re not comfortable opening things, bring it in as-is and we’ll do exactly that, free, as part of the diagnostic.
It’s the internet’s favourite suggestion and it fails on modern drives: circuit boards carry calibration data unique to their own drive in a small ROM chip, so a donor board without that chip’s contents leaves the drive just as dead — or worse, spinning with wrong parameters. Board-level repair works; blind board-swapping doesn’t.
Free 48-hour diagnostic at the Bristol lab tells you which branch you’re on — and what it takes to walk back down it with your files.