Question about Canon CanoScan D646U Flatbed Scanner
After days of struggling trying to install de XP version for this scanner I finally suceed and got it installed, but when it opens and try to scan something an error message is displayed saying:"Unable to open TWAIN source, check connesction and the restart toolbox".
I checked all connections and everything seems to be ok, what could be the problem?
Jacinto Gordón Jr,
Republic of Panamá
Could be a problem with the cables themselves. Try a new set or different set of cables and see if this resolves the issue. Also make sure that you installed the correct version of the driver for your OS.
Should you still have difficulties, try a clean boot as explained below:
(Just replace "camera" in the procedure for scanner.)
Posted on May 15, 2008
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Posted on Jan 02, 2017
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