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- Deskjet 9800 flashing red lights.

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01-16-2019 12:13 PM
Product: HP Deskjet 9800
Operating System: Microsoft Windows 7 (32-bit)
Installed two new cartridges and the printer's red lights are flashing. Colour is HP 344 and Black is HP 339.
Also using USB 2 port.
When the printer boots up it sends out a blank page.
I'm unable to print anything including test pages.

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