Question about HP LaserJet 2420 Printer

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Attention light flashing- says replace black cartridge

Have replaced black cartridge and attention light still flashes. The only way to get it to print is to open the top cover and close it. The printer then checks itself and retrieves data, then prints. Have to open the top plate every time to print.

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  • DrakonisLuna Nov 14, 2008

    Same problem except opening and closing top cover has no effect. The message implies that this is a color printer which it is not. The error message is not listed anywhere for this printer. HP provides no help.

  • stackjlm Apr 01, 2009

    jallejar, what is the gobutton on an HP laserjet 2420dn? I have the same issue with the attention light flashing replace black cartridge.

  • Anonymous Apr 27, 2009

    Have replaced black cartridge and attention light still flashes

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Try reset the printer. Turn off powerswitch, press gobutton, turn on powerswitch while pressing gobutton. hold approx 15sec and release the button. The printer will reboot. Clean the cartridge contacts and HV pins in printer.

Posted on Nov 22, 2008

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I still waiting for solution.

Posted on Jan 28, 2009

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HP.com does provide a web page that describes a specific problem associated with a blinking Attention light:

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