Question about Canon CanoScan N640P Flatbed Scanner
I have many years of experince repairing Canon scanners so here is my suggestion.
First off I would go back to USB its faster then a parallel cable for scanning purposes. Second if your computer is a very old one then just get a usb card and install it in to your computer. Also make sure you have the latest drivers for the operating system your running. The drivers are free on Canons website. Just google Canon Canoscan N640P drivers it should take you directly to Canon's website also I would download capture perfect its free also an will function perfectly with your scanner.
When you install the newest drivers make sure your scanner is disconnected from your computer. Once the drivers are installed then attach the USB cable to your computer. You should get a message saying new drivers are being installed then reboot your computer and you should be good to go with whatever you want to scan.
I hope this helps you out.
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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I have seen your message stating that "Initialization failed - Unable to acquire TWAIN-compliant device" error is received when trying to connect USB-Parallel type to your Laptop.
Well, Printer Panasonic UF4100, recommends to use only " Printer/Scanner Interface as Bi-directional Parallel (IEEE1284) " means you need to use Parallel cable to connect Printer to the Computer/Notebook. You may receive some communication error messages if you are using a "PORT REPLICATOR CABLE"( USB TO PARALLEL connector). The error message that you have received is related to the communication error. Futher, if you use same USB- Parallel cable for long time the Printer Hardware functionality might go bad, since Printer memory gets confused and will not read or detect the Cable , since it is not a cable to use mentioned by Panasonic Manufacturer.
Let me tell you, general functionality of Printer like Printing would work even if you use USB-Parallel cable. But it is not a case with Scanner and Fax functionality.
Hence, I recommend you to use only Parallel cable to connect your Printer to the Laptops.
I hope that this will resolve the issue for you.
You can email me at email@example.com if you need further assistance.
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