https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/My-MX420-won-t-scan-It-says-my-USB-is-unplugged-Help/m-p/111929#M32379 <P>I have an MX420 all-in-one printer and recently needed to use the scanner. It looked very simple until I pressed "SCAN". The error message on my laptop said "Cannot scan for these reasons. Scanner is turned off, USB cable is disconnected. Please check and try again. Error Code 2,156,50."</P><P>The printer was plugged in and switched on, the scanner light is on and the USB cable is plugged into the laptop. Just to be sure, I changed the machine from scanning to printing, selected a page to print and clicked "Print". It worked with no problems at all. I tried changing to another port, (there are 3 ports on my lapto) with no success. It just kept showing the same message!</P><P>I tried changing it to wireless. Followed all the instructions and got wireless connection, but when I tried to scan it only gave me the choice of a pc connection with local USB!!!!!! I use Norton 360 for security. The scanner worked fine when we got the machine, but I haven't used it in 2 years. I've taken all advice from others on this forum, from youtube and from other on-line sources, but none of it has worked. My laptop automatically updates every week too!</P><P>Please can someone help me! This thing cost a fortune but it wont even do a simple scan.</P><P>&nbsp;</P> Tue, 26 Aug 2014 15:57:15 GMT Specialred14 2014-08-26T15:57:15Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/My-MX420-won-t-scan-It-says-my-USB-is-unplugged-Help/m-p/111929#M32379 <P>I have an MX420 all-in-one printer and recently needed to use the scanner. It looked very simple until I pressed "SCAN". The error message on my laptop said "Cannot scan for these reasons. Scanner is turned off, USB cable is disconnected. Please check and try again. Error Code 2,156,50."</P><P>The printer was plugged in and switched on, the scanner light is on and the USB cable is plugged into the laptop. Just to be sure, I changed the machine from scanning to printing, selected a page to print and clicked "Print". It worked with no problems at all. I tried changing to another port, (there are 3 ports on my lapto) with no success. It just kept showing the same message!</P><P>I tried changing it to wireless. Followed all the instructions and got wireless connection, but when I tried to scan it only gave me the choice of a pc connection with local USB!!!!!! I use Norton 360 for security. The scanner worked fine when we got the machine, but I haven't used it in 2 years. I've taken all advice from others on this forum, from youtube and from other on-line sources, but none of it has worked. My laptop automatically updates every week too!</P><P>Please can someone help me! This thing cost a fortune but it wont even do a simple scan.</P><P>&nbsp;</P> Tue, 26 Aug 2014 15:57:15 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/My-MX420-won-t-scan-It-says-my-USB-is-unplugged-Help/m-p/111929#M32379 Specialred14 2014-08-26T15:57:15Z