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  1. d_a_parker

    The BlueSCSI Project: Replacing My Dead Quantum ProDrive

    My bad! I missed the part where you said "the hard drive spun up but I got nothing but the floppy icon." So, yeah, if you can hear (and feel) that the platters are spinning, then the motor is working and it's not a voltage issue. If the head is stuck, you can sometimes free it up without...
  2. d_a_parker

    The BlueSCSI Project: Replacing My Dead Quantum ProDrive

    Based on your original description of the problem, I don't think you needed to open the drive in this case. The drives that @djc6 was able to fix by opening all had spinning platters but stuck heads, and in that case, you do need to physically free the heads somehow. But it sounds to me like...
  3. d_a_parker

    The BlueSCSI Project: Replacing My Dead Quantum ProDrive

    On the HA13441, pin 2 (Vcc) should be 12V, and pins 18, 20, and 22 (the outputs) should each be around 5V. The dead drive I'm currently working on has 12V on the input but less than 1V on each of the output pins, so it's likely that the IC is bad. I've seen this before and have fixed a few...
  4. d_a_parker

    The BlueSCSI Project: Replacing My Dead Quantum ProDrive

    I know this is too little too late, but opening a hard drive is almost never the answer. The symptom you're describing is almost always an issue with voltage from the logic board to the motor, and not any of the internals. I currently have the same model drive in the same state, and I traced the...