Question about Canon CanoScan 8400F Flatbed Scanner

3 Answers

CanoScan8400 Suddenly Doesn't Work

For some reason, my 8400F doesn't turn on.  I've tried it in several different outlets.  Is there a fuse that could be blown?   Any other thoughts?
It has worked perfectly for some time.

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  • mo99 Oct 14, 2008

    I have the same problem. My CanoScan8400 no longer turns on.

  • tmarsden Oct 14, 2008

    I have the same problem. I took the unit to Best Buy GeekSquad and the technician determined that the AC power adapter is shot. I'm on the hunt to locate a new adapter and expect to not only find a supplier but also pay less than $20. Not bad compared to the price of a new scanner.

  • disanders Nov 24, 2008

    After not using my Canoscan for awhile it won't turn on now. I reinstalled it but still no results. I only had this one year...

  • dmcfad Dec 02, 2008

    Same problem. Canon replaced scanner twice under warranty, but same problem again. Now power adapter dead again. Something in the scanner must be killing the power supplies. Canon won't help now that warranty gone.



  • mistersquid Jan 18, 2009

    Dead in December 2008. No power up. In process of buying new power adapter.

  • RepeatGuest Feb 06, 2009

    January 2009, haven't used it in a couple of months, now it won't turn on. Funny, I was thinking it might the power adapter even though these don't often go bad. One possible cause is that I swapped out the surge protector recently. However the scanner and the surge protectors were switched off at the time all plugging/unplugging was done.

  • RepeatGuest Feb 06, 2009

    January 2009, haven't used it in a couple of months, now it won't turn on. Funny, I was thinking it might be the power adapter even though they don't usually go bad. One possible cause is that I swapped out the surge protector recently. However the scanner and the surge protectors were turned off at the time all plugging/unplugging was done.


  • RepeatGuest Feb 06, 2009

    January 2009, haven't used it in a couple of months, now it won't turn
    on. Funny, I was thinking it might be the power adapter even though
    they don't usually go bad. One possible cause is that I swapped out the
    surge protector recently. However the scanner and the surge protectors
    were turned off at the time all plugging/unplugging was done.


  • ajluk Mar 11, 2009

    Scanner has just failed to power up - am assuming it's the power supply (though am getting old one tested). Any of you managed to source a new supply? If so, where and how much?

  • Sinky1956 Apr 08, 2009

    Hi mistersquid

    I have the same problem and was in the process of looking on eBay for a new adapter / power cord. Can you post the model / make and perhaps the seller's name. It would help me to ensure I get the correct one. cheers deltic11

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I had the same problem about a year ago. The solution was to replace the power cord AND don't leave it connected to the powers source when the scanner is not in use, or it will burn out again.

Posted on Mar 17, 2009

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Need power cord

Posted on Jan 17, 2011

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You can find a new power adaptor on eBay. Mine cost about $20 US.
To prevent future problems, I plugged my replacement adaptor in to a power strip that is normally powered off, which should extend the life of the shoddily-engineered CanonScan 8400F power adaptor.
There oughtta be a class action.

Posted on Mar 17, 2009

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Try this:

Open the CanoScan Toolbox.
Click the Save option.
Put a check in the box that states "Display the Scanner Driver".
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Click the Advanced Mode tab.
Make sure Select Source is set to "Platen".
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