https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF642Cdw-Serial-Number-Rejected-for-Software/m-p/488386#M23152 <P>Hello Mlandau33,</P> <P>If the serial number on the back of the printer did not work with the firmware update, you can try viewing the device information to check if the serial number matches or if the other one was incorrect.&nbsp;<SPAN>Press the Status Monitor button and then select Device Information. The serial number will be listed at the bottom. If you continue to have issues, I suggest contacting support over the phone at 1-800-652-2666. Our agents would be happy to assist.</SPAN></P> Wed, 17 Jul 2024 17:52:49 GMT Hector 2024-07-17T17:52:49Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF642Cdw-Serial-Number-Rejected-for-Software/m-p/444115#M20668 <P>I have an MFC642. I'm trying to update the firmware. When I put in the required serial number, 2LQ2<FONT color="#FF0000">[xxxx]</FONT>, it is being rejected. I'm reading the number on the label in the rear. It is the same number I used when I first registered the printer.</P><P><FONT color="#FF0000">[Serial number partially hidden for privacy.]</FONT></P> Thu, 02 Nov 2023 15:28:27 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF642Cdw-Serial-Number-Rejected-for-Software/m-p/444115#M20668 mlandau33 2023-11-02T15:28:27Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF642Cdw-Serial-Number-Rejected-for-Software/m-p/488386#M23152 <P>Hello Mlandau33,</P> <P>If the serial number on the back of the printer did not work with the firmware update, you can try viewing the device information to check if the serial number matches or if the other one was incorrect.&nbsp;<SPAN>Press the Status Monitor button and then select Device Information. The serial number will be listed at the bottom. If you continue to have issues, I suggest contacting support over the phone at 1-800-652-2666. Our agents would be happy to assist.</SPAN></P> Wed, 17 Jul 2024 17:52:49 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF642Cdw-Serial-Number-Rejected-for-Software/m-p/488386#M23152 Hector 2024-07-17T17:52:49Z