Member Avatar for Didzy

Hi All,

Could someone help me please.. I have a network printer with a jetdirect card in the back.. When I turn on the printer I keep getting the message "Service Call 21" showing on the printer. I have never seen this type of error before and was unsure to what it meant..
I have tried power cycling the printer, I have checked to make sure their is no paper etc inside. I have checked cartridges.
Could someone please offer some advice you you known what this error could be..

Thanks in advance..
Didzy

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Member Avatar for whipaway

What is the exact model of the HP?

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