Cannot Print Using AirPrint
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Check1 Make sure printer is turned on.
If the printer is turned on, cycle the power switch, and then check whether the issue is resolved.
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Check2 Make sure printer is registered to your computer.
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Check3 Make sure printer is connected by LAN to same group of networks (same subnet) as AirPrint compliant device when printing over LAN.
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Check4 Make sure printer has enough paper and ink.
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Check5 Make sure no error message is displayed on printer's LCD.