I switch the whole system (computer and printer) off for about 2 hours over dinner but no different.
I have been having trouble with my computer and did a system restore only this morning.The printer was working after that, hiccuped half way through a print and refused to work again.
I've switch it all off and on and changed the USB cable.
Still the same.
CNBJN Canon BJ Network Port
Thanks very much for your help.
I know where to look next time!!