I have a D2680 connected by a USB cable to a Toshiba laptop running Win 7. In Devices and Printers, the printer is usually listed as offline. By doing a hard reset and/or pressing the power button I can eventually get the printer online, but when I send it a document to print, nothing happens. If I then press the power button I get a Printer Error message. Sometimes when I reboot my computer a document will print. I haved used several USB cables, with no change. The light for the black cartridge is flashing. I've tried everything I've read from HP (cleaqning the cartridge contacts, restarting Print Spooler Service), but the printer isn't reliable. Sometimes the power button flashes, but nothing ever prints.
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