Question about Canon CanoScan LiDE 25 Flatbed Scanner

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Problems with my scanner (CanonScan Lide 25)

My scanner (CanonScan Lide 25) is connected to my computer and the lock switch is set to UNLOCKED. But when I try to scan something my scanner sounds like it's starting the scan but after 2 seconds it stops and this message appears on my screen : "Release the lock switch. detach the I/F cable and reconnect. Scanner driver will be closed." When I click "OK" this message also appears "Unable to open TWAIN source.Please check connection. Then re-start Toolbox."
Could my cable be broken or one of the USB entrance? Please help me if you know what could be the problem.

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  • Anonymous Mar 11, 2009

    Same Problem

  • Anonymous Mar 24, 2009

    same problem also


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3 Answers

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This happened to me - my scanner is properly unlocked but a popup message keeps telling me to unlock the switch. I have tried several solutions shared by other users (added path for twain_32, locked/unlocked/replugged USB, uninstall/reinstall), everything did not work until I tried using a third party software. My scanner now works fine, I'm glad I didn't dispose of it after years of "not working". My conclusion - CanoScan Toolbox has issues.

Posted on Feb 08, 2012

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  • jumbolaki
    jumbolaki Oct 03, 2012

    What third party Software did you use? Please share. Tnx.

  • jumbolaki
    jumbolaki Oct 03, 2012

    what third party software did you use? Please share. Tnx.

  • L. Cheng Oct 04, 2012

    VueScan, but you have to buy the license. Weigh first which option is more economical - to buy a new scanner vs the software license. When you use the trial version of this software, scanned images come with watermarks. As a workaround for low-res scans such as ID photos or cards, I screen-captured the preview screen which has no watermarks, and paste in Photoshop or MS Word, then crop. Of course this low-res screen capture won't do for scanned documents as the text won't be readable at such low resolution. In that case, you'd really need the paid license.

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You have to modify your Path variable. It works for me. Follow this web link
http://weblogs.asp.net/jeffwids/archive/2009/11/02/canon-scanner-unable-to-open-twain-source.aspx

Posted on Oct 26, 2011

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