Question about HP Officejet Pro L7780 All-In-One InkJet Printer

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HP L7780 will not align and will not print in black. When I print out the self-testpage, it prints only in magenta. I have gone through 5 hours of BS with HP and nothing seems to work.

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I just went through this problem. I called HP and they said to do a Semi-Reset, which is where you first make sure the plug is directly plugged into the wall outlet, not a power strip or battery backup, unplug the printer while it is powered on, wait 20-30 seconds,and while holding # and 6 plug the cord back into the printer, wait for a message or blank screen and then push the "On/Off" button. This has worked for me a few times now, although you have to go through some setup to get it back to where you like it.

Posted on Dec 23, 2008

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Posted on Jan 02, 2017

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HP Officejet Pro L7780 all-in-one, Windows Vista, set up as a wireless network printer, prints multiple copies of test page and also other documents, when only one is selected both at the computer and...


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