Printer Repair Questions? Ask IT Technicians for Answers ASAP
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Your firewall, if of a readjusting kind, may have readjusted to block the scanning functions. It is possible for a firewall (of any kind) to do this, owing to printing being over a different channel than scanning, and/or considerations of the direction of transactions being made over the network for each function.
What scanner utility are you using? is there any error message?
I suggest going back into the firewall settings, selecting the scanner utility program, and 'opening' it, giving it rights, to free communication with ( specifically ) your printer's local IP address (which I suggest be a 'fixed' IP address, one that won't vary with repeated startups of the local router box.)