Hi suecardy,
You network may need to be restarted to reconnect the printer wirelessly. To do this, please follow these steps:
1. Turn off your computer and the printer, then unplug the printer from the power outlet.
2. Unplug your wireless router for at least 60 seconds, then plug it back in and turn it back on.
3. Once the router comes back on, please wait about 5 minutes, then plug the printer back in and turn it and the computer back on and attempt to print again.
If you still experience difficulty, we ask that you please contact a Canon technical support representative for further assistance by entering your product name and selecting a support method here. A representative will be happy to assist you free of charge.
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