Ok guys so I was running a badly needed defrag on an old laptop hdd and a few minutes after it completed (I let it just sit there afterwards) the screen went black and the machine was frozen. I powered down and when I turned the laptop back on I received the cannot find disk 0 error. I checked in the BIOS but the drive is not recognized there either. So I took the drive out and hooked it up to a desktop I have with an adapter. I can hear and feel it spinning, no clicking or weird noises, but the BIOS in this PC does not see the drive either. I am trying to locate another drive so I can switch out the logic board but I was wondering if there was anything else I could try first. Thanks!

Even if you didn't specify, sounds like a travelstar hdd... Changing the pcb is not a good idea.

Why does everyone assume its the pcb?

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Buy your friends Toshiba\Hitachi and your enemies Seagate.

Oh if it was so simple
What I would give if all the problems could be fixed just by
swapping pcb's.

Yah at least try the freezer or double boiling first before assuming the pcb...

_________________
Buy your friends Toshiba\Hitachi and your enemies Seagate.

ROTFLMAO

You forgot the toaster oven.

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You don't have to backup all of your files, just the ones you want to keep.

Unless the drive is an older model IBM or Hitachi (pre-IBM) then changing the PCB will be of no value because there are flash ROM contents that have to be transferred as well. Frankly when faced with a spinning drive the PCB is not the most likely culprit.