The fault · the machine lists nothing
Drives come in from all over Birmingham with the same complaint: the computer no longer lists them. That is a report about a circuit, not about your files. Ask three questions in order — does the BIOS see the disk, does Disk Management, does File Explorer — and the stage it falls at names the broken part: board, firmware or file system.
Tell an engineer what it is doing
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| Symptoms | What is behind it | What to do |
|---|---|---|
| Disk Management shows Unknown, Not Initialized | There is a disk there. There is no readable signature and no partition table on it | Decline the prompt |
| The box that says “…before Logical Disk Manager can access it” | Accept it and a blank partition map goes down on top of everything | No, then pull the power |
| Disk Management reporting No Media | The controller is all that answers; nothing can reach the storage behind it. That makes it hardware, not logic | No more replugging |
| No disk in the BIOS at all | A board or its firmware — scorched PCB, shorted protection diode, service-area code that no longer loads | Component-level repair |
| The BIOS gives the size as 8MB on a 1TB disk | Damage in the firmware or the translator: the reported size is now meaningless | This needs firmware tools, not software |
| It does nothing when powered | The board has burnt out; its TVS diode is shorted | The odds are good |
Every item gets a case number of its own the day it lands. An engineer then works out what has actually failed and tells you plainly which files have a real chance of coming back and which do not. Only then does a price follow: one figure, fixed, in writing, and it costs you nothing to see it. Nothing is charged until you say yes.
Nothing is opened and nothing is run for long. A few minutes at the BIOS, then Disk Management, then Explorer narrows it to one of three: electronics to mend, a service area to rebuild, or a file system to repair on a copy.
A shorted diode comes off and a new one goes on. A board too far gone is replaced with a donor, and your own ROM chip is lifted onto it, because the adaptive values written into that chip were measured from your platters and match no other disk.
As soon as the drive responds it is copied in full, sector by sector. All the repair work then happens on that copy; the original is shelved and left alone.
No invoice is raised until the full list of recovered files has sat in front of you and you have said go ahead. Your data comes back on media we buy new, posted at our expense, and the job is not closed here until every file has opened on your own machine.
Worth remembering: almost every undetected drive that reaches this bench has failed in its electronics or its firmware — the parts that present a disk to the computer, not the parts that hold what you wrote to it. Absence from a list is a hardware symptom, and nothing more than that.
A power cut in the small hours, and the desktop came back next morning with only one of its two disks. No spin, nothing in the BIOS: the PCB had burnt through at the TVS diode. The ROM went across to a donor board, and a complete image was off it within two days of arrival.
Usually, yes. A board can be repaired or replaced, and whatever killed it seldom reaches the platters or memory chips behind it. Drives that will not power up are among the more predictable jobs on this bench.
Never. That prompt is asking to write a blank partition map over the one that records where your files start. Click no, unplug it, and let it be examined before anything else touches the disk.
No. A drive missing from the BIOS has lost its voice, not its contents — the failure is in the board or the service-area code, and neither of those is where your files live.
Very likely. The spike stops at the protection diode, soldered on to fail first so the rest of the board does not have to. You lose the electronics; the recording stays put.
Every extra power-up takes something off a drive that is already going. Leave it switched off and let the free diagnosis say what still reads.