Error: Cannot communicate with any of the scanners...

[canon_user2]

I have an ImageClass MF4890dw that I am using wirelessly with a Mac running macOS Sierra 10.12.16. When I start my MF Toolbox application I get the following error: "Cannot communcate with any of the scanners. The scanners may not be connected, or may be turned off". See attached image.

Things I have done to troubleshoot (to no avail):

• Updated drivers
• Updated MF Toolbox application
• Accessed the printer from the Mac via the IP address in a web browser
  • Printer is accessable and all three statuses (printer, fax, and scanner) show as green

Any help would be appreciated!

[Sonya1]

Hello canon_user2,

Since you are using your imageCLASS MF4890w via your wireless network, you need to register the scanner to the MF Toolbox.  Please follow these steps to register the scanner to the MF Toolbox:

 1.  Double-click the icon of [MF Toolbox] installed in the following folder.

The hard disk you are using ->[Applications] ->[Canon MF Utilities]

 2.  Click [Network Scanner Settings] from the [MF Toolbox] menu.  The [Network Scanner] dialog box is displayed.

 3.  Click [+] (or [Add]).

 4.  Register the scanner you want to use.

 (1) Click [IP].
 (2) Enter the IP address or host name of the scanner you want to use.
 (3) Click [Add].
 (4) Proceed to Step 5.

 5.  Close the [Network Scanner] dialog box.

If you need immediate assistance and you're in the USA, please click http://Canon.us/ContactCF for our US-based support. If you're outside of the US, please click http://Canon.us/4xf7 for support options.

Did this answer your question? Please click the Accept as Solution button so that others may find the answer as well.

[canon_user2]

Sonya1,

The ImageCLASS is already registed with the MF Toolbox. But when I select the "Scanner" tab the printer name is greyed out. See the attached image. Any other ideas?

[Sonya1]

Hello canon_user2,

Since the MF4800 is greyed out, I recommend contacting our Enterprise & Desktop Solutions Divisions at 1-800-OK-CANON (652-2666), Monday - Friday 8:00 a.m. to 8:00 p.m. ET for further assistance.  I realize that the forum may be your preferred method of communication; however, speaking with our telephone technical support group will be very beneficial in this case

[canon_user2]

Sonya1,

I actually started with the phone support option. But they were not able to fix my issue. They insisted it was a problem with my home network (and told me to contact my router's tecnical support) even though the Mac and the ImageCLASS are connected just fine (see attached image). This forum is my last resort! Hoping someone can help.

[KevinPorter]

I am having the same problem with my Color ImageCLASS MF733Cdw

[Darius]

Hi KevinPorter.

Try opening the printer's Remote UI. If it doesn't open, verify that it has been enabled in the printer's menus.

<Menu>  <Management Settings>  <License/Other>/<Remote UI Settings/Update Firmware>  <Remote UI Settings>  <Remote UI>  Select <On> in <Use Remote UI>  Select <Off> or <On> in <Use TLS>  <Apply>  Restart the machine

If the Remote UI is enabled and doesn't show up, then the router is not allowing the printer and computer to communicate effectively.  Double-check the printer's network status; it should be at least Good.  If it's reporting as bad, move it closer to the router, and/or minmize obstructions between the the two.

If the Remote UI pops up, and (as was posted above for the original poster) the printer has been registered to the scanning software, then something on the computer is blocking the scanning software. Double-check that the firewall and/or antivirus are allowing the scanning software and the printer to communicate.

Did this answer your question? Please click the Accept as Solution button so that others may find the answer as well.

[sczech]

I am having this same issue and to be honest, I am ready to throw this printer through the window! I have owned it since March of 2019 and it's been the hardest printer to set up and configure. I miss my Epson that just worked without installing a driver!

I have the latest firmware, the latest drivers. I have the MF743CDW. I thought it was all working after spending 2 hours messing with it last week. I was able to print and it wasn't super light text and bad colors like it has been for the past year. Scanning does not work. Well it did work. I was able to scan to my Mac running Catalina. Worked great! I was able to open the Scangear software from my Mac and scan that way too.

Today is a different story. Printing doesn't work. Scanning doesn't work. I changed it to a static IP because my IP address was changing daily. 

The only way I can get this thing to work is to uninstall and re-install the driver. Every day. I'm sick of it. What do I do? I don't have virus software and nothing crazy on my machine. I just want to print and scan. I hate this printer so much! You have no idea how frustrated I am! I am a senior software engineer and have troubles understanding where to go for some settings and trying to remember how to get to the UI is a nightmare.

Please help!!!! I don't want to have to throw this $300 useless printer out the window. It's very heavy and I will probably give myself a hernia!

[sharmelan]

sczech. you are absolutey right.

Working the MF743Cdw is an absolute nightmare. I am not sure how a printer in 2020 can still have issues working with an absolute easy to use OS as as the Mac OS. 

Bonour/Airprint does not work most of the time. Frequent resetting of the print system is needed for it to see the printer. Even then, its not guaranteed to keep the printer connected. 

Out of the blue, the Scanner has now gone missing. No amount of resetting the system or restarting the computer helped bring it back. The driver install is unnecessarily complex. The MF toolset is not easy to use. 

I cannot see how this printer is targetted towards a small business; which demands higher reliability than a home environment. This printer/scanner is everything but reliable. My plan is, to use it until the Toner depletes. Then I am moving on to a more reliable platform for use. 

[sczech]

I'm glad I'm not the only one! What are we supposed to do? 

To scan something into the computer, I have to plug a USB drive into my Canon and hope that it's formatted correctly (most of my sticks DON'T work) and when it's done scanning, I have to insert the drive into my computer.

OR, I can uninstall and reinstall the driver to get it to work. 

Either way, unacceptable. At least with my old printer/scanner, I could scan to Dropbox. That wasn't a bad solution.