30 November 2010

Hard drive recovery project, part 4

See part 3 of the hard drive recovery project here.

Torx screwdriver acquired, checklist complete.  Now on to the results...

I tried a variety of possible combination of devices to better isolate the problem.  For the sake of simplicity, I'll label my desktop, hard drive, and PCB as #1 and Tracy's as #2.  Tracy's HD2, PCB2 and Desktop2 are all known working devices.

So the initial problem is that HD1 and PCB1 do not work in Desktop1.  The drive does not appear to spin up at all, and we are rewarded with a message that there is no bootable device to be found.  Hard drive is not recognized in the BIOS setup.

HD1 and PCB1 in Desktop2: No bootable device. Hard drive is not recognized in the BIOS setup.

HD1 and PCB2 in Desktop3 (this was my first experiment a few weeks back): No bootable device. Hard drive is not recognized in the BIOS setup.

HD1 and PCB2 in Desktop1: BIOS is slow to start and eventually errors to a hard disk error. However, the hard drive is recognized in the BIOS and you can hear at least attempt to spin up. Also, changing the boot order to CD first and trying to boot from a CD encounters the same error.

HD1 and PCB2 in Desktop2: BIOS is slow to start and eventually errors to hard disk error. However, the hard drive is recognized in the BIOS and you can hear at least attempt to spin up. Also, changing the boot order to CD first and trying to boot from a CD encounters the same error.

HD2 and PCB1 in Desktop1: No bootable device. Hard drive is not recognized in the BIOS setup.

We know all #2 devices work, so that brings us back to the suspect devices, HD1 and PCB1.

Here are my theories:

(1) PCB1 is bad. PCB2, while the same revision, is not sufficiently similar to work with HD1.

(2) PCB1 is bad. HD1 is also bad.

Ideas?
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