MF4770n scanner function quit working. Error message "connect computer" is displayed

GOWhite64 — Thu, 17 Dec 2020 03:53:43 GMT

My symptoms appear identical to those described by WUSONG on 7/20/2019. I followed the corrective action, executing a scanner patch. But no success.

I have the Canon MF4770n scanner/printer/fax/copier attached, via a network, to a PC running Windows 10. Previously, I had the MF4770n attached, via a network, to a PC running Windows 7.

For 5+ years, the scan function worked fine on the Windows 7 PC. Near the end of the Windows 7 Computer's service, the symptoms started. The problem persists when attached to the current Windows 10 PC.

Printing works fine on the network (on both the previous Windows 7 PC and the current Windows 10 PC). But when I attempt to execute a scan, the MF4770n display keeps showing "connect computer".

This problem started itermittently, on the Windows 7 PC. Restarting the computer seemed to correct it. Then, even that process failed, making the problem permanent.

The MF4770n (serial number QZJ892XX). I anonymized the last two numbers of the serial number.

In addition, the printer no longer goes into Energy Saver mode on its own. And won't go into that mode when I press the button.

I have reloaded the driver for the printer.

I tried attaching the printer to the computer via a USB cable (disconnecting the network cable, updating the driver to let it know I was (now) using a USB cable.

Nothing works.

I downloaded and installed the patch provided in WUSONG's troubleshooting thread. Still, the problems persist.

topic MF4770n scanner function quit working. Error message "connect computer" is displayed in Office Printers

MF4770n scanner function quit working. Error message "connect computer" is displayed