CanoScan 4400F won't communicate with Toolbox 5.0

After two external disk crashes, I have apparently mostly recovered from loss of some files and programs. One lingering problem is still no communication established between CanoScan 4400F scanner and CanoScan Toolbox 5.0. I have checked connections repeatedly and successfully downloaded new scanner driver and new Toolbox program, after first deleting the existing version.
The error message when starting up Toolbox is "Cannot communicate with scanner. Cable may be disconnected or scanner may be turned off. Check status. Scanner driver will be closed. 1.0.0." The scanner does not have an on/off switch.
I'm badly in need of some guidance on what to do next.

Unless you removed it, Pages ’09 v4.3 was automatically moved into /Applications/iWork '09 folder during the Pages v5 installation process.
You can continue to use the older Pages with Antidote, but must be careful to not double-click documents to open them, because Pages v5 will intervene. Pages v5+ will irreparably damage earlier Pages documents, as the new document architecture is entirely incompatible.

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It would appear that the printer USB port is damaged. It would be best to contact HP Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all other regions, click here.
JERENDS
I work on behalf of HP
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" to the left of the reply button to say “Thanks” for helping!

My 2009 mac pro won't communicate with the connected monitor

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Download and run this utility: Download and run this utility: http://h20180.www2.hp.com/apps/Nav?h_pagetype=s-926&h_lang=en&h_client=s-h-e17-1&h_keyword=dg-NDU&ju...
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If my post resolved your problem, please mark it as an Accepted Solution ...
I worked for HP but now I'm retired!

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CanoScan 4400F won't communicate with Toolbox 5.0

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