Chilean midfielder Carlos Villanueva scored the only goal of the game to spare Blackburn's blushes as brave Blyth's FA Cup dream finally came to an end.
Villanueva's excellent 59th-minute free-kick was enough to book Sam Allardyce's Barclays Premier League side a fourth round trip to Sunderland.
The visitors had the better of the game at Croft Park, but survived two late scares when both Andrew Wright and Alex Gildea went close to an equaliser inside the final five minutes.
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