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re: Canon N650U scanner Thursday, November 6, 2003 at 5:41 pm Posted by Steve (21647 messages posted) I would first try just un and reinstalling the scanner and drivers. The drivers may have gotten corrupted On Thursday, November 6, 2003 at 5:03 pm, Angela Lam wrote: >Hi my stupid scanner is suddenly acting up after having used it 4 yrs without any >trouble. I plugged the USB cable into my laptop computer and pressed the scanner's >little blue button as per usual to bring up the scangear toolbox but nothing happened! >the toolbox can open from Window's start menu but every time i click on the "scan" >button on the toolbox, a little dialog box came up and said "cannot communicate with >scanner. cable may be disconnected. check status. scanner driver will be closed". >a 2nd dialog box says "unable to open TWAIN source. please check connection. then >re-start toolbox". The cable IS NOT loose and the scanner doesn't need any external >power sources. i tried 2 scan with another computer and it worked perfectly fine- >so the scanner itself isn't dead. wots the problem?!? [Reply or follow-up to this message] re: Canon N650U scanner Thursday, November 6, 2003 at 6:49 pm Posted by George W Bush is a murderer (119 messages posted) Have you used the scanner on this computer before? Have you used any other USB devices? Are your USB ports enabled? If not youmay have to enter the BIOS Setup to enable them. "Disabled" seems to be the default on a lot of computers. Alan On Thursday, November 6, 2003 at 5:03 pm, Angela Lam wrote: >Hi my stupid scanner is suddenly acting up after having used it 4 yrs without any >trouble. I plugged the USB cable into my laptop computer and pressed the scanner's >little blue button as per usual to bring up the scangear toolbox but nothing happened! >the toolbox can open from Window's start menu but every time i click on the "scan" >button on the toolbox, a little dialog box came up and said "cannot communicate with >scanner. cable may be disconnected. check status. scanner driver will be closed". >a 2nd dialog box says "unable to open TWAIN source. please check connection. then >re-start toolbox". The cable IS NOT loose and the scanner doesn't need any external >power sources. i tried 2 scan with another computer and it worked perfectly fine- >so the scanner itself isn't dead. wots the problem?!? [Reply or follow-up to this message] re: Canon N650U scanner Friday, November 7, 2003 at 1:29 pm Posted by Angela Lam (2 messages posted) Yes I have used the same scanner on the same computer heaps of times- this is the first time it's stuffed up... and other USB devices seem to be working fine, like my CD burner, camera and even pocket pc all seem to make connection without any trouble. weird. [Reply or follow-up to this message] Hummm..... Friday, November 7, 2003 at 4:37 pm Posted by JmC (14166 messages posted) Make sure that you don't have a device, or to many devices that require more power than your USB port can supply. A standard onboard USB port has 450 to 500mA of power (this is the USB standard). Examples of power used by USB devices: Microsoft USB mouse - 100mA Saitek Cyborg 3D joystick - 20mA Kodak DC4800 camera - 2mA USB network card - 180mA A Cannon Scanner N65OU, uses 500mA of power just plugged in and up to 800mA when scanning If all of these USB devices were used at one time, they would need 1102mA of power, but the total provided by the motherboard USB port is only 500mA. The only way to use this many USB devices at once, is to get a self powered USB hub. A powered USB hub uses 0mA from the motherboard and has up to 5000mA available. If you want, or need to use many USB devices at one time, you should use a powered hub. Some devices like scanners, even on their own, need a powered hub. They can run off the motherboard, but it is not recommended if they use over 400mA. Some devices can also be plugged in directly and use self-power mode, rather than using the bus-power provided by the motherboard. You should check to see if this is an option for any devices you use. To find out how much power your devices are using...open 'Device Manager'. In the listing 'Universal Serial Bus Controllers', select 'USB Root hub' and then the 'Power' tab. It will list the mA for devices plugged in. There will be a USB root hub for every two ports you have available on your board. This will vary between 2 and 6. JmC On Friday, November 7, 2003 at 1:29 pm, Angela Lam wrote: >Yes I have used the same scanner on the same computer heaps of times- this is the >first time it's stuffed up... and other USB devices seem to be working fine, like >my CD burner, camera and even pocket pc all seem to make connection without any trouble. >weird. [Reply or follow-up to this message] re: Canon N650U scanner Friday, October 14, 2005 at 3:10 am Posted by George (1 messages posted) This solution that worked for me is here: http://www.computer-one.org/new-2767552-4584.html On Thursday, November 6, 2003 at 5:41 pm, Steve wrote: >I would first try just un and reinstalling the scanner and >drivers. The drivers may have gotten corrupted > > [Reply or follow-up to this message] re: Canon N650U scanner Wednesday, February 14, 2007 at 9:22 pm Posted by Kris (1 messages posted) Hi George, I can't reach the site http://www.computer-one.org/new-2767552-4584.html anymore. How dit you resolve the scanner problem? " Cannot communicate with scanner. Cable may be disconnected. Check status." I tried also "everything" but nonetheless... On Friday, October 14, 2005 at 3:10 am, George wrote: >This solution that worked for me is here: http://www.computer-one.org/new-2767552-4584.html > > > [Reply or follow-up to this message] re: Canon N650U scanner Wednesday, February 14, 2007 at 11:09 pm Posted by gewg_ (3925 messages posted) |I can't reach the site |http://www.computer-one.org/new-2767552-4584.html [any more]. | Kris http://www.archive.org/index.php http://web.archive.org/web/*/http://www.computer-one.org/new-2767552-4584.html http://web.archive.org/web/20060513181846/http://www.computer-one.org/new-2767552-4584.html [Reply or follow-up to this message] Tip: Use one of the [Reply or follow-up to this message] links above to add a message to this thread Search this forum Start a new thread on a different subject Report abuse of the forum Return to the Windows 98 Discussion Forum