MG7720 won't scan

[wdv]

I can't seem to get my MG7720 to scan. It's on a wireless network, and printing works fine, but my computer/network can't seem to find the scanner. I've tried to use the IJ Scan Utility in the Canon Utilities folder but again with no success. I've got a Mac running El Capitain 10.11.6, and I've downloaded the latest firmware.

[Michael]

Hello.

What error occurs when you are unable to scan with the IJ Scan Utility program?

For faster assistance, find more help at Contact Us.

[wdv]

Error occurred while communicating with scanner (-9923)

[Patrick]

HI wdv,

Please try reinstalling your PIXMA MG7720.  To uninstall your PIXMA MG7720, please follow these steps:

 1.  Click on the Apple in the upper left hand corner and then System Preferences.

 2.  Click on Printers and Scanners.

 3.  Click once on the PIXMA MG7720 and click the "-" button at the bottom of the list.

 4.  Repeat until all are removed from the list.

Once done, please follow these steps to reinstall:

 1.  Visit Canon's website at: http://www.usa.canon.com/support

 2.  Type PIXMA MG7720 in the "Enter a Model" box and click GO.

 3.  Under Drivers, please click the Select button next to the MG7700 series Full Driver & Software Package (OS X).

 4.  Click on the Download button.  The file will be downloaded.

 5.  Please open the Downloads folder.

 6.  Double click [mac-mg7700-1_1-mcd.dmg].  A new disk image will be created.

 7.  Doiuble click the new disk image to begin the installation process.

To view the wireless installation process, please use the following link:

http://downloads.canon.com/wireless/setup_mg7700_mac.pdf

Once reinstalled, please attempt to scan.

If you continue to have difficulties, please contact our support group using the following link:

http://Canon.us/ContactLI