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CONOSCAN D1250U2 SHOWS - CANNOT COMUNICATE WITH SCANNER-CABLE MAY BE DISCONECTED-SCANNER DRIVER WILL BE CLOSED. ALSO- UNABLE TO OPEN TWAIN SCOURCE-PLEASE CHECK CONNECTION THEN RESTART TOOL BOX. CABLE IS CONNECTED WHAT CAN I DO? JOE

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Try oit opna another machine could be power supply undervoltage on the usb port trya powered USB hub instead

Posted on Jul 26, 2008

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Unable open twain source please


This is an issue with the Driver Installation, Get the drivers Uninstall and reinstalled from the CD.

May 11, 2013 | Canon CanoScan LiDE 25 Flatbed Scanner

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Need twain driver for canoscan d1250u2 scanner. I tried downloading it from the canon website but it will not install. I tried the original cd but it says I need the twain driver.


I have many years repairing Canon scanners so here is my suggestions to you.

I would google Canon CanoScan D1250U2 drivers once more and make sure you download them from Canons official website. The drivers have dates on them so make sure you install the newest ones. Before you install them disconnect the cable that goes to your computer from the scanner. Then install the drivers. Once the drivers are installed reconnect the cable to your computer and make sure the scanner is powered on. You should get a pop up saying new drivers are being installed. Once this completes I would then reboot your computer one more time and you now should be able to scan.

I hope this helps you out

Mar 16, 2011 | Canon CanoScan D1250U2 Flatbed Scanner

1 Answer

When i try to scan i get this message: unable to open TWAIN source Please check connection then re-start Toolbox the connections are tight


Driver mismatch - the driver of the scanner has forgotten the location of the TWAIN driver because another software has been using it lately. Follow this
http://weblogs.asp.net/jeffwids/archive/2009/11/02/canon-scanner-unable-to-open-twain-source.aspx

Feb 20, 2011 | Canon CanoScan LiDE 30 Flatbed Scanner

1 Answer

My canoscan fb620u shows device offline.


It your using a newer windows you probably need new software. Try Vue Scan it worked for me on Windows 7 64bit and I have the same scanner. With out dated software it wont recognize the scanner. Hope it helps

Dec 24, 2009 | Canon CanoScan FB620U Flatbed Scanner

1 Answer

My computer is unable to open twain driver


you may need to reinstall the twain driver at this time, or use a different application program inorder to scan
appreciate your kind comment

Apr 12, 2009 | Canon BJC S600 InkJet Printer

1 Answer

Your post for CanoScan LiDE 25


Hi there, yes I did everything per your instructions, Toolbox is installed and it still says, "release the lock switch, detach I/F cable and reconnect. Scanner driver will be closed" and then after clicking on that it says "Unable to open TWAIN source. Please check connection then restart toolbox" I have been to the Canon site and downloaded driver sites and it says everything is working. but when I go to scan it comes up with the boxes I said before. Quite lost at the moment? Thanks Maureen. PS I have unstalled and reinstalled

May 22, 2008 | Canon CanoScan LiDE 25 Flatbed Scanner

1 Answer

"Unable to open TWAIN server" Please assist


track down the twain driver for that scanner.. thats the box that opens when you scan... google for the company, download the driver.. re-install tadahh.
Still no luck? manually remove the old one.. use search to finfd the twain folder in your windows system (prob twain32) then re-install.
Still no luck? Scanner has died.

Feb 16, 2008 | Canon CanoScan N656U Flatbed Scanner

1 Answer

Lock Switch and IF cable


Mine was doing the same thing. When I get on the program, before I click "acquire" to preview and scan, I click OFF the toolbox and then everything seems to be okay and I can go ahead and scan.

Nov 27, 2007 | Canon CanoScan LiDE 25 Flatbed Scanner

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