The scanner is not working. I keep getting an error saying that the Scanner is turned off and the USB is disconnected. Neither are true. The printing function works and it's connected by a USB cable. I've tried multiple USB ports, I've deleted extra folders in the TWAIN_32 folder besides the MX390 Series folder. and the wiatwain.ds file. I am running Windows 7. Thanks for any suggestions.
I ran into the same problem. Occurred on windows, occurred on Mac. Occurred irrespective of operating system version.
In windows the scanner showed up in the device manager and I could see it disappear when I unplugged the scanner.
Strangely enough what worked for me is using a different USB cable. I went from using the one that came with the scanner to another one I had laying around. Then things worked fine.
I have this problem too and it's recurrent.
Yesterday I spent 40 minutes on the phone with Canon - they got me to turn the printer off and on then off and on, press the black button to do a test copy, and so fourth..
he got it scanning again, but if I unplug the printer to put it away, and get it out to use it again, the same problem happens again
so today I turned the laptop on and brought the laptop into the room I'm working in and it's happening again 😞
NOT WORKING SAME ERROR
The 5,156,69 error can be caused by security software that is enabled on your computer.
Do you have Norton, McAfee or Webroot installed on your computer?
I'm having this problem as well - Pixma MG5750, running Win 10 with Avast antivirus running. I disabled Avast temporarily basd on advice in this post and had no results. Printing is fine, it's purely scanning which is one of the main reasons I bought this model. I even went and hunted up the USB cable and plugged that in. Still unable to scan. Please help?
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.