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External hard drive can not be seen on My Computer

I turned off my Acomdata HD160U2E-509 external hard drive while going on vacation. When I returned home and turned it on, it's status light began to blink between red and blue at a constant rate. I assume that means it has an error somewhere. However, without being able to find the hard drive at all on my computer, I can't fix it. Is there any way to fix the drive, or at least be able to see it?

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  • EMJeney Jan 10, 2009

    Yes, plugging it into a different computer hasn't helped

  • EMJeney Jan 10, 2009

    Windows Vista SP1. And Windows XP SP 2 (updating to SP3 refused to work). However, my primary computer is the Vista one.

  • EMJeney Jan 10, 2009

    No, I don't get any error messages, can't even seem to connect. I can't tell there is an error by the odd blinking on the front of the drive, though. It blinks between red and blue, trying to signal something to me.

  • EMJeney Jan 10, 2009

    Nope, the only things in my Disk Management menu are my main hard drive and my dvd drive.

  • reatha24 Jan 30, 2009

    I bought my acomdata hard drive M/N PDHDxxxUSE-72 just before christmas. When I came home today I logged onto my computer and the hard drive is not recognized by my computer. I cannot find it in the device manager nor is it shown in my tray that its connected.

  • carbojunky Mar 03, 2009

    I have the same problem with the light blinking between red and blue. I get no error message, just the blinking and the beeping. HELP.

  • Debs
    Debs May 11, 2010

    do you get any error messages at all?

  • Debs
    Debs May 11, 2010

    what version of windows are you using and which service pack?

  • Debs
    Debs May 11, 2010

    or plugging it into a different computer to see if it is a problem with the actual harddrive or the computer?

  • Debs
    Debs May 11, 2010

    have you tried plugging it into a different usb port?



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It might still be connected but may need a letter assigned to the drive, go into disk management and if it is there right click it and assign it a letter. If it is not then look at this forum for more ideas

I hope this helps

to get into disk management, go to Control Panel> administrative tools> computer management and will see disk managment in the left menu (for vista)

Posted on Jan 10, 2009



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