https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539228#M25955 <P>Terrific.&nbsp; Thanks for your feedback.&nbsp; <span class="lia-unicode-emoji" title=":thumbs_up:">👍</span></P> Wed, 12 Mar 2025 16:24:09 GMT shadowsports 2025-03-12T16:24:09Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/538897#M25919 <P>Was trying to follow <A href="https://support.usa.canon.com/kb/s/article/ART173904" target="_self">this article</A> but the download center doesn't accept our serial # which begins with WTQ followed by five digits.</P> <P>I also tried registering the printer online but it too rejects the serial #.</P> <P>We took a photo of the label and are sure we have this correct.</P> <P>Printer was manufactured in January 2018.</P> Tue, 11 Mar 2025 12:04:15 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/538897#M25919 thedude2 2025-03-11T12:04:15Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539115#M25934 <P>Anyone?</P><P>I've called support twice but have been on hold for an hour.</P> Tue, 11 Mar 2025 20:25:55 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539115#M25934 thedude2 2025-03-11T20:25:55Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539151#M25937 <P>Greetings,</P> <P>If your printer is connected to the internet you should be able to upgrade the firmware directly from the printer's LCD.&nbsp; Just scroll to the right and tap the update firmware icon.&nbsp; It takes a few minutes, then restarts.&nbsp; You do<SPAN>n't have to enter a serial number, etc.&nbsp; To resolve your error, you need firmware version v6.02 or later according to this KB.</SPAN></P> <P><SPAN><A href="https://support.usa.canon.com/kb/s/article/ART173904" target="_blank" rel="noopener">https://support.usa.canon.com/kb/s/article/ART173904</A></SPAN></P> <P><SPAN>If you end up needing your serial number, you can log into the remote UI and get it there or grab it from the label on the printer's box if you still have it.&nbsp;&nbsp;</SPAN></P> Tue, 11 Mar 2025 23:44:09 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539151#M25937 shadowsports 2025-03-11T23:44:09Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539157#M25938 <P>Greetings,</P> <P>Your serial number is in Printers Web Server / Remote UI&nbsp;<span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="shadowsports_0-1741738890861.png" style="width: 400px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/64985iFEAC22D0F72496A8/image-size/medium?v=v2&amp;px=400" role="button" title="shadowsports_0-1741738890861.png" alt="shadowsports_0-1741738890861.png" /></span></P> Wed, 12 Mar 2025 00:22:22 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539157#M25938 shadowsports 2025-03-12T00:22:22Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539204#M25942 <P>Thanks. This solution was not mentioned in the support article and&nbsp;&nbsp; would have saved us a couple of hours. But my bad, I had the wrong model # 735 instead of 733.</P><P>The LCD update worked and fixed the problem.</P> Wed, 12 Mar 2025 14:20:23 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539204#M25942 thedude2 2025-03-12T14:20:23Z https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539228#M25955 <P>Terrific.&nbsp; Thanks for your feedback.&nbsp; <span class="lia-unicode-emoji" title=":thumbs_up:">👍</span></P> Wed, 12 Mar 2025 16:24:09 GMT https://community.usa.canon.com/t5/Office-Printers/imageCLASS-MF735Cdw-serial-rejected-can-t-download-firmware-to/m-p/539228#M25955 shadowsports 2025-03-12T16:24:09Z