How it failed · not detected
A drive the computer can't see is one of the most recoverable faults on this bench — because where it fails to appear tells us exactly what broke. Electronics and firmware die far more often than the platters and chips that actually hold your data.
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| What you see | What it means | First move |
|---|---|---|
| Disk Management: Unknown, Not Initialized | Windows sees a disk but can't read a valid signature or partition table | Do not initialise |
| You must initialize a disk before Logical Disk Manager can access it | Windows offering to write a fresh signature over your data | Decline and power down |
| Disk Management: No Media | The controller answers but can't reach the storage behind it — usually hardware failure | Stop replugging it |
| Missing from BIOS entirely | Electronics or firmware: a dead PCB, blown protection diode, or corrupt firmware | Board-level lab work |
| BIOS shows the wrong capacity (a 1TB drive as 8MB) | Firmware or translator corruption — the drive has forgotten its own size | Firmware repair, not software |
| No spin, no lights, dead silent | Dead PCB — often a blown TVS diode after a power surge | Very recoverable |
Your device is logged with its own case reference the moment it arrives. An engineer assesses the fault, confirms what's actually recoverable, and you get a fixed price in writing — no diagnosis fee, no obligation, and no paid work until you say go.
BIOS, Disk Management or Explorer — a five-minute assessment that separates a £-hundreds electronics fault from a firmware or logical job, before anything is touched.
Blown diodes and dead boards are repaired or replaced — with your drive's original ROM transferred to the donor board so it recognises its own platters.
Once the drive answers, it's imaged in full and the file system rebuilt from the copy — the original is retired the moment the image completes.
Before you pay the recovery fee you approve a full listing of what came back. Your data returns on new media with free return postage, and the case only closes once you've confirmed everything opens on your side.
Bench pattern worth knowing: of the drives that arrive completely undetected, the clear majority fail in electronics or firmware — components around the data, not the data itself. That's why 'my computer can't see it' and 'my files are gone' are very different sentences.
Dead the morning after a power cut — no spin, no BIOS entry. A blown TVS diode and a scorched board; the ROM moved to a donor PCB and the drive imaged completely the same day it was opened.
Frequently, yes. Dead electronics are replaceable, and the platters or memory chips behind them usually survive untouched. No-power faults have some of the best outcomes on the bench.
No. Initialising writes a fresh signature over the structures that describe your data. Decline, power down, and get it assessed.
Almost never on its own. BIOS-invisible means the drive can't introduce itself — electronics or firmware — not that the data was erased.
Probably not. Surges blow the protection diode on the drive's board — which is exactly the sacrifice it's there to make. The board dies; the data usually doesn't.
Every restart of a damaged device costs data. Open a case first — the diagnosis is free either way.