imageCLASS MF656Cdw Computer can't communicate with scanner

[KPed24]

Cannot communicate with any of the scanners. The scanners may not be connected, or may be turned off

I'm normally not so negative, but GOSH I HATE CANON! I just bought a Canon MF656CDW and have had problems with it since day 1. Why did I ever switch to Canon?! If I hadn't spent all this money on this printer and a ton of money on toner cartridges, I'd throw this brand new printer in the garbage! I'd like to demand my money back and GO BACK TO HP PRINTERS! 

I spent almost two hours on the phone with a Canon tech getting everything going fine. That lasted for two days and now I'm having issues! 

Please help me! Don't tell me to reinstall the drivers, restart the computer/printer, yada yada yada! I've done all this with a specialist a few times during my two hour phone conversation last time I called! 

[mreg]

Then I would delete whatever's there and add your printer back using its IP address.  If that works, if you can set the IP for the printer to "static" in the printer web UI and your router.

[russp41]

This may not solve your problem, but may help someone else. I had a similar issue issue using WiFi to connect to the MF656Cdw printer. Printing worked, scanning would start, but then failed with error "Cannot communicate with the scanner." and Code: 155,0,0. After rebooting my Windows 10 laptop and printer, and investigating solutions for over an hour, I then tried turning off and restarting my WiFi router, and that solved the problem for me. I hope you find a solution for your problem.