I have a Thinkpad laptop with x64 Windows 10. I have a MP620 printer and the laptop coonected to a WiFi. I have had this network for a few years.
Everything was fine, printing and scanning..until Dec-2018. Printer refused to scan to the computer. I was able to print, however. After checking into forums, I called Cannon. The service technician uninstalled and re-installed the driver. The scanning functionality resumed working.
A couple of days ago, I wanted to print a document. I got a "Printer not responding" message. I checked the Printer forum, but could not find relevant info. I checked Canon website and I did a couple of things it suggested.
First, I verified that both the laptop and the printer are networked with the same SSID. Then, I powered off the laptop, printer, and the network's Router and Modem. After a few minutes, I powerd on the Modem, after a couple of minutes powered on the Router. Then, booted the laptop and turned on the power to the printer. When I tried to print a document, I again received the same "Printer not responding" message.
I tested scanning from both printerand laptop, and both processes scanned properly.
I hope I have given a complete picture.
So, not sure why when printing worked the scanning did not work, and when Canon helped for Scan to work properly, printing is not working.
Needing help for a robust and reliable fix. I need both scanning and printing functionality to work.